You raise some interesting issues, Buzz.

Yes, I do have some other timers running.

Yes, I have some temporary buttons to change the two prontoscript variables and test the results (changing the onHoldInterval doesn't seem to make much difference). One issue is that I can't do the same for the two database variables (duration and general delay) and, more generally, do not really understand these two variables. More specifically:

1. What is the 'default' duration and can I change this?

2. Does the 'general delay' affect the time between any two IR codes or only particular ones (e.g. in a channel macro)? What should its value typically be?