You wire a switch across the potentiometer. When you activate the switch it has the same effect as full deflection on the stick. An addtional Servo is connected in parallel with the DBC channel that controls the cannon shot. When you push the button the cannon fires, and the additonal servo on the same channel gives you full deflection back and forth. The servo recoil was under my nose the whole time. Recent testing comfims that this work fine.

So all you need to have servo recoil on a DBC3 is to tie in a servo with a splitter cable to the same channel on your receiver that fires the cannon. However you still have the fire at will with the IR shot only firing based on DBC timing.

The Benedini option I talked about earlier for firing a recoil mechanism will still be my first choice as it gets rid of the false recoils.