In all of the above, I forgot to address your key question -

The Jetronics unit allows endpoint adjustment of the output channels - so that will allow you to tinker with the door servo channel throws and EPA's(s), but not individually if using multiple servos.

I had a similar issue with a tailwheel retract (servo driven, Y'ed with the main gear air valve servo), I solved it by using a Matchbox, which allows individual endpoint and throw adjustment for up to 4 servos per input channel.

Barry