Thanks Damien.
It's a pity.
I really need it to be automated - everything I've been doing the past little while is focusing (pardon the pun) on making sure I can kick off and let it go all night on it's own in the dome.
At another level, having SOME control over it and using the microfocuser is still an option, but not achieving the goal quite right.
A friend has suggested that maybe looking to see if there is a stepper motor that could be dropped in to it, that might be an option, which I suspect could then be run with this project:
https://sourceforge.net/projects/ard...ocuserpro2diy/