diff --git a/examples/fm_receiver.grc b/examples/fm_receiver.grc
deleted file mode 100644
index b22ae98..0000000
--- a/examples/fm_receiver.grc
+++ /dev/null
@@ -1,483 +0,0 @@
-options:
-  parameters:
-    author: ''
-    catch_exceptions: 'True'
-    category: '[GRC Hier Blocks]'
-    cmake_opt: ''
-    comment: ''
-    copyright: ''
-    description: 'FM receiver template for fm_scanner.py'
-    gen_cmake: 'On'
-    gen_linking: dynamic
-    generate_options: no_gui
-    hier_block_src_path: '.:'
-    id: fm_receiver
-    max_nouts: '0'
-    output_language: python
-    placement: (0,0)
-    qt_qss_theme: ''
-    realtime_scheduling: ''
-    run: 'True'
-    run_command: '{python} -u {filename}'
-    run_options: run
-    sizing_mode: fixed
-    thread_safe_setters: ''
-    title: FM Receiver
-    window_size: (1000,1000)
-  states:
-    bus_sink: false
-    bus_source: false
-    bus_structure: null
-    coordinate: [8, 8]
-    rotation: 0
-    state: enabled
-
-blocks:
-- name: freq
-  id: variable
-  parameters:
-    comment: ''
-    value: 102.0e6
-  states:
-    bus_sink: false
-    bus_source: false
-    bus_structure: null
-    state: enabled
-- name: samp_rate
-  id: variable
-  parameters:
-    comment: ''
-    value: int(2.4e6)
-  states:
-    bus_sink: false
-    bus_source: false
-    bus_structure: null
-    state: enabled
-- name: analog_wfm_rcv_0
-  id: analog_wfm_rcv
-  parameters:
-    affinity: ''
-    alias: ''
-    audio_decimation: '10'
-    comment: ''
-    maxoutbuf: '0'
-    minoutbuf: '0'
-    quad_rate: 480e3
-  states:
-    bus_sink: false
-    bus_source: false
-    bus_structure: null
-    state: enabled
-- name: audio_sink_0
-  id: audio_sink
-  parameters:
-    affinity: ''
-    alias: ''
-    comment: ''
-    device_name: ''
-    num_inputs: '1'
-    ok_to_block: 'True'
-    samp_rate: '48000'
-  states:
-    bus_sink: false
-    bus_source: false
-    bus_structure: null
-    state: enabled
-- name: low_pass_filter_0
-  id: low_pass_filter
-  parameters:
-    affinity: ''
-    alias: ''
-    beta: '6.76'
-    comment: ''
-    cutoff_freq: 100e3
-    decim: '5'
-    gain: '1'
-    interp: '1'
-    maxoutbuf: '0'
-    minoutbuf: '0'
-    samp_rate: 2.4e6
-    type: fir_filter_ccf
-    width: 10e3
-    win: window.WIN_HAMMING
-  states:
-    bus_sink: false
-    bus_source: false
-    bus_structure: null
-    state: enabled
-- name: osmosdr_source_0
-  id: osmosdr_source
-  parameters:
-    affinity: ''
-    alias: ''
-    ant0: ''
-    ant1: ''
-    ant10: ''
-    ant11: ''
-    ant12: ''
-    ant13: ''
-    ant14: ''
-    ant15: ''
-    ant16: ''
-    ant17: ''
-    ant18: ''
-    ant19: ''
-    ant2: ''
-    ant20: ''
-    ant21: ''
-    ant22: ''
-    ant23: ''
-    ant24: ''
-    ant25: ''
-    ant26: ''
-    ant27: ''
-    ant28: ''
-    ant29: ''
-    ant3: ''
-    ant30: ''
-    ant31: ''
-    ant4: ''
-    ant5: ''
-    ant6: ''
-    ant7: ''
-    ant8: ''
-    ant9: ''
-    args: '"rtl=0"'
-    bb_gain0: '20'
-    bb_gain1: '20'
-    bb_gain10: '20'
-    bb_gain11: '20'
-    bb_gain12: '20'
-    bb_gain13: '20'
-    bb_gain14: '20'
-    bb_gain15: '20'
-    bb_gain16: '20'
-    bb_gain17: '20'
-    bb_gain18: '20'
-    bb_gain19: '20'
-    bb_gain2: '20'
-    bb_gain20: '20'
-    bb_gain21: '20'
-    bb_gain22: '20'
-    bb_gain23: '20'
-    bb_gain24: '20'
-    bb_gain25: '20'
-    bb_gain26: '20'
-    bb_gain27: '20'
-    bb_gain28: '20'
-    bb_gain29: '20'
-    bb_gain3: '20'
-    bb_gain30: '20'
-    bb_gain31: '20'
-    bb_gain4: '20'
-    bb_gain5: '20'
-    bb_gain6: '20'
-    bb_gain7: '20'
-    bb_gain8: '20'
-    bb_gain9: '20'
-    bw0: '0'
-    bw1: '0'
-    bw10: '0'
-    bw11: '0'
-    bw12: '0'
-    bw13: '0'
-    bw14: '0'
-    bw15: '0'
-    bw16: '0'
-    bw17: '0'
-    bw18: '0'
-    bw19: '0'
-    bw2: '0'
-    bw20: '0'
-    bw21: '0'
-    bw22: '0'
-    bw23: '0'
-    bw24: '0'
-    bw25: '0'
-    bw26: '0'
-    bw27: '0'
-    bw28: '0'
-    bw29: '0'
-    bw3: '0'
-    bw30: '0'
-    bw31: '0'
-    bw4: '0'
-    bw5: '0'
-    bw6: '0'
-    bw7: '0'
-    bw8: '0'
-    bw9: '0'
-    clock_source0: ''
-    clock_source1: ''
-    clock_source2: ''
-    clock_source3: ''
-    clock_source4: ''
-    clock_source5: ''
-    clock_source6: ''
-    clock_source7: ''
-    comment: ''
-    corr0: '0'
-    corr1: '0'
-    corr10: '0'
-    corr11: '0'
-    corr12: '0'
-    corr13: '0'
-    corr14: '0'
-    corr15: '0'
-    corr16: '0'
-    corr17: '0'
-    corr18: '0'
-    corr19: '0'
-    corr2: '0'
-    corr20: '0'
-    corr21: '0'
-    corr22: '0'
-    corr23: '0'
-    corr24: '0'
-    corr25: '0'
-    corr26: '0'
-    corr27: '0'
-    corr28: '0'
-    corr29: '0'
-    corr3: '0'
-    corr30: '0'
-    corr31: '0'
-    corr4: '0'
-    corr5: '0'
-    corr6: '0'
-    corr7: '0'
-    corr8: '0'
-    corr9: '0'
-    dc_offset_mode0: '0'
-    dc_offset_mode1: '0'
-    dc_offset_mode10: '0'
-    dc_offset_mode11: '0'
-    dc_offset_mode12: '0'
-    dc_offset_mode13: '0'
-    dc_offset_mode14: '0'
-    dc_offset_mode15: '0'
-    dc_offset_mode16: '0'
-    dc_offset_mode17: '0'
-    dc_offset_mode18: '0'
-    dc_offset_mode19: '0'
-    dc_offset_mode2: '0'
-    dc_offset_mode20: '0'
-    dc_offset_mode21: '0'
-    dc_offset_mode22: '0'
-    dc_offset_mode23: '0'
-    dc_offset_mode24: '0'
-    dc_offset_mode25: '0'
-    dc_offset_mode26: '0'
-    dc_offset_mode27: '0'
-    dc_offset_mode28: '0'
-    dc_offset_mode29: '0'
-    dc_offset_mode3: '0'
-    dc_offset_mode30: '0'
-    dc_offset_mode31: '0'
-    dc_offset_mode4: '0'
-    dc_offset_mode5: '0'
-    dc_offset_mode6: '0'
-    dc_offset_mode7: '0'
-    dc_offset_mode8: '0'
-    dc_offset_mode9: '0'
-    freq0: freq
-    freq1: 100e6
-    freq10: 100e6
-    freq11: 100e6
-    freq12: 100e6
-    freq13: 100e6
-    freq14: 100e6
-    freq15: 100e6
-    freq16: 100e6
-    freq17: 100e6
-    freq18: 100e6
-    freq19: 100e6
-    freq2: 100e6
-    freq20: 100e6
-    freq21: 100e6
-    freq22: 100e6
-    freq23: 100e6
-    freq24: 100e6
-    freq25: 100e6
-    freq26: 100e6
-    freq27: 100e6
-    freq28: 100e6
-    freq29: 100e6
-    freq3: 100e6
-    freq30: 100e6
-    freq31: 100e6
-    freq4: 100e6
-    freq5: 100e6
-    freq6: 100e6
-    freq7: 100e6
-    freq8: 100e6
-    freq9: 100e6
-    gain0: '10'
-    gain1: '10'
-    gain10: '10'
-    gain11: '10'
-    gain12: '10'
-    gain13: '10'
-    gain14: '10'
-    gain15: '10'
-    gain16: '10'
-    gain17: '10'
-    gain18: '10'
-    gain19: '10'
-    gain2: '10'
-    gain20: '10'
-    gain21: '10'
-    gain22: '10'
-    gain23: '10'
-    gain24: '10'
-    gain25: '10'
-    gain26: '10'
-    gain27: '10'
-    gain28: '10'
-    gain29: '10'
-    gain3: '10'
-    gain30: '10'
-    gain31: '10'
-    gain4: '10'
-    gain5: '10'
-    gain6: '10'
-    gain7: '10'
-    gain8: '10'
-    gain9: '10'
-    gain_mode0: 'False'
-    gain_mode1: 'False'
-    gain_mode10: 'False'
-    gain_mode11: 'False'
-    gain_mode12: 'False'
-    gain_mode13: 'False'
-    gain_mode14: 'False'
-    gain_mode15: 'False'
-    gain_mode16: 'False'
-    gain_mode17: 'False'
-    gain_mode18: 'False'
-    gain_mode19: 'False'
-    gain_mode2: 'False'
-    gain_mode20: 'False'
-    gain_mode21: 'False'
-    gain_mode22: 'False'
-    gain_mode23: 'False'
-    gain_mode24: 'False'
-    gain_mode25: 'False'
-    gain_mode26: 'False'
-    gain_mode27: 'False'
-    gain_mode28: 'False'
-    gain_mode29: 'False'
-    gain_mode3: 'False'
-    gain_mode30: 'False'
-    gain_mode31: 'False'
-    gain_mode4: 'False'
-    gain_mode5: 'False'
-    gain_mode6: 'False'
-    gain_mode7: 'False'
-    gain_mode8: 'False'
-    gain_mode9: 'False'
-    if_gain0: '20'
-    if_gain1: '20'
-    if_gain10: '20'
-    if_gain11: '20'
-    if_gain12: '20'
-    if_gain13: '20'
-    if_gain14: '20'
-    if_gain15: '20'
-    if_gain16: '20'
-    if_gain17: '20'
-    if_gain18: '20'
-    if_gain19: '20'
-    if_gain2: '20'
-    if_gain20: '20'
-    if_gain21: '20'
-    if_gain22: '20'
-    if_gain23: '20'
-    if_gain24: '20'
-    if_gain25: '20'
-    if_gain26: '20'
-    if_gain27: '20'
-    if_gain28: '20'
-    if_gain29: '20'
-    if_gain3: '20'
-    if_gain30: '20'
-    if_gain31: '20'
-    if_gain4: '20'
-    if_gain5: '20'
-    if_gain6: '20'
-    if_gain7: '20'
-    if_gain8: '20'
-    if_gain9: '20'
-    iq_balance_mode0: '0'
-    iq_balance_mode1: '0'
-    iq_balance_mode10: '0'
-    iq_balance_mode11: '0'
-    iq_balance_mode12: '0'
-    iq_balance_mode13: '0'
-    iq_balance_mode14: '0'
-    iq_balance_mode15: '0'
-    iq_balance_mode16: '0'
-    iq_balance_mode17: '0'
-    iq_balance_mode18: '0'
-    iq_balance_mode19: '0'
-    iq_balance_mode2: '0'
-    iq_balance_mode20: '0'
-    iq_balance_mode21: '0'
-    iq_balance_mode22: '0'
-    iq_balance_mode23: '0'
-    iq_balance_mode24: '0'
-    iq_balance_mode25: '0'
-    iq_balance_mode26: '0'
-    iq_balance_mode27: '0'
-    iq_balance_mode28: '0'
-    iq_balance_mode29: '0'
-    iq_balance_mode3: '0'
-    iq_balance_mode30: '0'
-    iq_balance_mode31: '0'
-    iq_balance_mode4: '0'
-    iq_balance_mode5: '0'
-    iq_balance_mode6: '0'
-    iq_balance_mode7: '0'
-    iq_balance_mode8: '0'
-    iq_balance_mode9: '0'
-    maxoutbuf: '0'
-    minoutbuf: '0'
-    nchan: '1'
-    num_mboards: '1'
-    sample_rate: 2.4e6
-    sync: sync
-    time_source0: ''
-    time_source1: ''
-    time_source2: ''
-    time_source3: ''
-    time_source4: ''
-    time_source5: ''
-    time_source6: ''
-    time_source7: ''
-    type: fc32
-  states:
-    bus_sink: false
-    bus_source: false
-    bus_structure: null
-    state: enabled
-- name: xmlrpc_server_0
-  id: xmlrpc_server
-  parameters:
-    addr: 0.0.0.0
-    alias: ''
-    comment: ''
-    port: '8090'
-  states:
-    bus_sink: false
-    bus_source: false
-    bus_structure: null
-    state: enabled
-
-connections:
-- [osmosdr_source_0, '0', low_pass_filter_0, '0']
-- [low_pass_filter_0, '0', analog_wfm_rcv_0, '0']
-- [analog_wfm_rcv_0, '0', audio_sink_0, '0']
-
-metadata:
-  file_format: 1
-  grc_version: 3.10.12.0