I use a Flashback delay at the end of my pedal board's signal chain. In the middle of the signal chain, I use an A/B switch to split the signal to two different amps.
Is it possible to run the Flashback delay in dual mono mode, so that I can use the delay for each of the signals? Obviously, either L or R input signal will be quiet and the same should apply for the output.
The Flashback Delay can actually be used as a dual mono unit in the described situation: If both I/O's are connected, and you feed one side only, you will get an output signal only on the corresponding output.
The drawback is that you cannot run the system in stereo at any moment.