Sounds like you've got a good grip on it Nigel
I'm only dipping my toe in the water myself and reckon I need a better camera
For planetary/lunar, some of the stacking software can derotate, but I use a GEM so I've not had to do it. If you find that function, you should be able to record the avi as long as you can keep the object on the chip. Also many say to use f/20 or higher on planets, my scope is f/10 by default. I failed at the second hurdle last week when I couldn't get Jupiter on the chip with the Barlow
For focussing, you might want to try a bahtinov mask ... you point the scope at a bright star and adjust the pattern accordingly and then just don't touch the focuser again.