We could add extra buttons, but this would increase the cost and would not help current owners.
Typically people set the delay by ear, and then use the encoder to fine tune. I suspect that if your requirements are much more sophisticated than this, you should probably be looking at a rack-mount unit. Or, some kind of MIDI controller might also help.
My belief is that catchup works fine – it may appear not to if the knob is already very close to the preset value.
There is no real answer to this that I can see – hopefully someone out there will have better ideas…
