Hi Jonathan,?
Impressive mods to your rig.??
I would add to Raj's suggestion that you check around the L5 and L7 mod.? Since CW does not use the BiDi amps, and you did modify the connection from the BiDi amps to the mixer, you may have gotten something misconnected, shorted, or open in that area.
Have fun finding the issue.
73
Evan
AC9TU