diff --git a/projects/fmcomms2/common/fmcomms2_bd.tcl b/projects/fmcomms2/common/fmcomms2_bd.tcl
index 9f2ff180a..5b8b07186 100644
--- a/projects/fmcomms2/common/fmcomms2_bd.tcl
+++ b/projects/fmcomms2/common/fmcomms2_bd.tcl
@@ -47,13 +47,14 @@
     set_property -dict [list CONFIG.C_CLKS_ASYNC_SRC_DEST {1}] $axi_ad9361_dac_dma
     set_property -dict [list CONFIG.C_CLKS_ASYNC_REQ_SRC {1}] $axi_ad9361_dac_dma
     set_property -dict [list CONFIG.C_2D_TRANSFER {0}] $axi_ad9361_dac_dma
-    set_property -dict [list CONFIG.C_DMA_DATA_WIDTH_DEST {128}] $axi_ad9361_dac_dma
+    set_property -dict [list CONFIG.C_DMA_DATA_WIDTH_DEST {64}] $axi_ad9361_dac_dma
 
     # channel packing for the ADC
     set util_adc_pack [create_bd_cell -type ip -vlnv analog.com:user:util_adc_pack:1.0 util_adc_pack]
     set_property -dict [list CONFIG.CHANNELS {4}] $util_adc_pack
 
     set util_dac_unpack [create_bd_cell -type ip -vlnv analog.com:user:util_dac_unpack:1.0 util_dac_unpack]
+    set_property -dict [list CONFIG.CHANNELS {4}] $util_dac_unpack
 
     # constant 0
     set constant_0 [create_bd_cell -type ip -vlnv xilinx.com:ip:xlconstant:1.1 constant_0]
@@ -177,14 +178,6 @@ if {$sys_zynq == 0} {
     connect_bd_net -net axi_ad9361_tx_data_out_n    [get_bd_ports tx_data_out_n]          [get_bd_pins axi_ad9361/tx_data_out_n]
 
     connect_bd_net -net axi_ad9361_clk              [get_bd_pins util_adc_pack/clk]
-    connect_bd_net -net gnd                         [get_bd_pins constant_0/const] [get_bd_pins util_adc_pack/chan_valid_4]
-    connect_bd_net -net gnd                         [get_bd_pins constant_0/const] [get_bd_pins util_adc_pack/chan_valid_5]
-    connect_bd_net -net gnd                         [get_bd_pins constant_0/const] [get_bd_pins util_adc_pack/chan_valid_6]
-    connect_bd_net -net gnd                         [get_bd_pins constant_0/const] [get_bd_pins util_adc_pack/chan_valid_7]
-    connect_bd_net -net gnd                         [get_bd_pins constant_0/const] [get_bd_pins util_adc_pack/chan_enable_4]
-    connect_bd_net -net gnd                         [get_bd_pins constant_0/const] [get_bd_pins util_adc_pack/chan_enable_5]
-    connect_bd_net -net gnd                         [get_bd_pins constant_0/const] [get_bd_pins util_adc_pack/chan_enable_6]
-    connect_bd_net -net gnd                         [get_bd_pins constant_0/const] [get_bd_pins util_adc_pack/chan_enable_7]
     connect_bd_net -net axi_ad9361_adc_valid_i0     [get_bd_pins axi_ad9361/adc_valid_i0]  [get_bd_pins util_adc_pack/chan_valid_0]
     connect_bd_net -net axi_ad9361_adc_valid_q0     [get_bd_pins axi_ad9361/adc_valid_q0]  [get_bd_pins util_adc_pack/chan_valid_1]
     connect_bd_net -net axi_ad9361_adc_valid_i1     [get_bd_pins axi_ad9361/adc_valid_i1]  [get_bd_pins util_adc_pack/chan_valid_2]
@@ -208,18 +201,10 @@ if {$sys_zynq == 0} {
     connect_bd_net -net axi_ad9361_dac_valid_1      [get_bd_pins util_dac_unpack/dac_valid_01] [get_bd_pins axi_ad9361/dac_valid_q0]
     connect_bd_net -net axi_ad9361_dac_valid_2      [get_bd_pins util_dac_unpack/dac_valid_02] [get_bd_pins axi_ad9361/dac_valid_i1]
     connect_bd_net -net axi_ad9361_dac_valid_3      [get_bd_pins util_dac_unpack/dac_valid_03] [get_bd_pins axi_ad9361/dac_valid_q1]
-    connect_bd_net -net gnd                         [get_bd_pins constant_0/const] [get_bd_pins util_dac_unpack/dac_valid_04]
-    connect_bd_net -net gnd                         [get_bd_pins constant_0/const] [get_bd_pins util_dac_unpack/dac_valid_05]
-    connect_bd_net -net gnd                         [get_bd_pins constant_0/const] [get_bd_pins util_dac_unpack/dac_valid_06]
-    connect_bd_net -net gnd                         [get_bd_pins constant_0/const] [get_bd_pins util_dac_unpack/dac_valid_07]
     connect_bd_net -net axi_ad9361_dac_enable_0     [get_bd_pins util_dac_unpack/dac_enable_00] [get_bd_pins axi_ad9361/dac_enable_i0]
     connect_bd_net -net axi_ad9361_dac_enable_1     [get_bd_pins util_dac_unpack/dac_enable_01] [get_bd_pins axi_ad9361/dac_enable_q0]
     connect_bd_net -net axi_ad9361_dac_enable_2     [get_bd_pins util_dac_unpack/dac_enable_02] [get_bd_pins axi_ad9361/dac_enable_i1]
     connect_bd_net -net axi_ad9361_dac_enable_3     [get_bd_pins util_dac_unpack/dac_enable_03] [get_bd_pins axi_ad9361/dac_enable_q1]
-    connect_bd_net -net gnd                         [get_bd_pins constant_0/const] [get_bd_pins util_dac_unpack/dac_enable_04]
-    connect_bd_net -net gnd                         [get_bd_pins constant_0/const] [get_bd_pins util_dac_unpack/dac_enable_05]
-    connect_bd_net -net gnd                         [get_bd_pins constant_0/const] [get_bd_pins util_dac_unpack/dac_enable_06]
-    connect_bd_net -net gnd                         [get_bd_pins constant_0/const] [get_bd_pins util_dac_unpack/dac_enable_07]
     connect_bd_net -net axi_ad9361_dac_data_0       [get_bd_pins util_dac_unpack/dac_data_00] [get_bd_pins axi_ad9361/dac_data_i0]
     connect_bd_net -net axi_ad9361_dac_data_1       [get_bd_pins util_dac_unpack/dac_data_01] [get_bd_pins axi_ad9361/dac_data_q0]
     connect_bd_net -net axi_ad9361_dac_data_2       [get_bd_pins util_dac_unpack/dac_data_02] [get_bd_pins axi_ad9361/dac_data_i1]