Been there, done that. A few suggestions:
Wrist gaskets: don't use anything that 's tapered. I've used all sorts of bottles, but the gaskets always tend to slip. Maybe you can tape them better than me, but why bother? Cut a piece of minicell (or ethafoam) the right diameter, cover the foam with packing tape so the glue doesn't stick, and use this. Foam is best - it'll give a little and is very easy to work with. If you're gluing to some old gasket, it's _really_ important to prepare by good sanding etc. I now put a couple rubber bands over the glued part and this seems to ensure a tight (sealed) glue job all the way around.
Neck gaskets ... are much more difficult. Go to the Kokatat site and use their instructions. Don't even try to save time using traffic cones or whatever; it just isn't worth it. Buy a bunch of the small spring clamps - they're good for all sorts of other things anyway.
Kokatat has great repair guides.