[Hemi]

Dear members, ive had the c925 evo for 4 weeks and this forum and its members have been great....the skies in Darwin haven't so much! Had 7th light yesterday....it was awesome......Tuc 47, Orion Neb, crab Neb, aldebaran, sombrero Galaxy, and then Jupiter and its moons.....and then our own moon.....WOW. My seeing ability is getting better, and I fumbled with the dslr a bit and managed to work out what goes where etc. and took a few pics! I would like some advice on the following issues please.
1. Focus and shake.....do most people use an electric focuser? Is it a good solution?
2. Frequently changing between different eye pieces and between visual eye pieces and dslr at prime focus is a fiddle. Any alternative solutions eg quick release mechanisms instead of thumb screws?
3. Can anyone recommend a good electronic log for observations. iPad or Mac ideally.
4. A recommendation for a good observation chair that's height adjustable.
Cheers