I finally figured how to achieve this today with the help of an Arduino.
In the command centre I set the tap switch to CV toggle, then used that signal to an Arduino which I programmed to do a pulse with each toggle, then sent that to an analogue switch IC which replicates the tap footswitch and sends the signal on to the Flashback.
Happy days, also the analogue switch IC has three more outs so I can do it to other pedals as well if needed.
