diff --git a/hier_blocks/ONBEAT_mod.grc b/hier_blocks/ONBEAT_mod.grc
index 5955301..1a2b795 100644
--- a/hier_blocks/ONBEAT_mod.grc
+++ b/hier_blocks/ONBEAT_mod.grc
@@ -83,6 +83,21 @@ blocks:
     coordinate: [64, 304.0]
     rotation: 0
     state: enabled
+- name: trailer_len
+  id: variable_tag_object
+  parameters:
+    comment: ''
+    key: pmt.intern("packet_len")
+    offset: '0'
+    src: pmt.intern("src")
+    value: pmt.from_long(64)
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [168, 504.0]
+    rotation: 0
+    state: disabled
 - name: OVERSAMPLING
   id: parameter
   parameters:
@@ -137,6 +152,26 @@ blocks:
     coordinate: [352, 312.0]
     rotation: 0
     state: enabled
+- name: blocks_repack_bits_bb_1_0_0
+  id: blocks_repack_bits_bb
+  parameters:
+    affinity: ''
+    alias: ''
+    align_output: 'False'
+    comment: ''
+    endianness: gr.GR_MSB_FIRST
+    k: '1'
+    l: '8'
+    len_tag_key: '""'
+    maxoutbuf: '0'
+    minoutbuf: '0'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [456, 512.0]
+    rotation: 0
+    state: disabled
 - name: blocks_tagged_stream_mux_0
   id: blocks_tagged_stream_mux
   parameters:
@@ -165,7 +200,7 @@ blocks:
     comment: ''
     maxoutbuf: '0'
     minoutbuf: '0'
-    repeat: 'False'
+    repeat: 'True'
     tags: '[preamble_len]'
     type: byte
     vector: preamble
@@ -185,7 +220,7 @@ blocks:
     comment: ''
     maxoutbuf: '0'
     minoutbuf: '0'
-    repeat: 'False'
+    repeat: 'True'
     tags: '[syncword_len]'
     type: byte
     vector: '[int(i) for i in syncword]'
@@ -197,6 +232,26 @@ blocks:
     coordinate: [168, 304.0]
     rotation: 0
     state: enabled
+- name: blocks_vector_source_x_0_0_0_0
+  id: blocks_vector_source_x
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    repeat: 'True'
+    tags: '[trailer_len]'
+    type: byte
+    vector: preamble
+    vlen: '1'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [272, 504.0]
+    rotation: 0
+    state: disabled
 - name: data_len
   id: parameter
   parameters:
@@ -289,7 +344,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [656, 400.0]
+    coordinate: [288, 416.0]
     rotation: 0
     state: enabled
 - name: preamble
@@ -333,6 +388,7 @@ connections:
 - [blocks_vector_source_x_0_0, '0', blocks_tagged_stream_mux_0, '0']
 - [blocks_vector_source_x_0_0, '0', pad_sink_0_0, '0']
 - [blocks_vector_source_x_0_0_0, '0', blocks_repack_bits_bb_1_0, '0']
+- [blocks_vector_source_x_0_0_0_0, '0', blocks_repack_bits_bb_1_0_0, '0']
 - [digital_constellation_modulator_0, '0', pad_sink_0, '0']
 - [pad_source_0, '0', blocks_tagged_stream_mux_0, '2']