I really want something that follows the main fader. An effect that didn’t do anything would be an easy solution. The hardest part would be coming up with a name. Of course a delay effect with zero original signal and a single bounce would work fine but you wouldn’t be able to adjust it from the iPad.
I patched from the Alt Out (Set for LR Post Fader) to Stereo 1 Input. I UN-assigned St1 from all but Aux 2 then used Aux 2 Out with the delay. I stood back by the delay speaker and used the iPad to adjust the delay time.
It worked but it’s kind of sketchy. I don’t like patching the back of the board. It makes me nervous.