Yeah I think there is a balanced view between what AA/Permaseal say (I think there err on the side of caution) and using gasket makers only without any gaskets at all (which sadly I have seen done on sump and even head gaskets) - by dodgy mechanics.

I think I will try putting them in dry to start with and keep an eye on any potential problems.

I'll buy some of these Permatex products anyway so they are on hand if I eventually need them.

It's a tough call, especially for crank seals which will be a hassel to redo...but life wasn't meant to always be easy...just most of the time.

Anyone put a rear main in without some sort of sealant - and NOT had it leak oil?

I reckon the biggest problem with sealers is using to much, for the rear seal cut the nozzle close to the end & put a small bead just in the corner, to much & the seal slips everywhere untill it dries.
Copper coat is good stuff for lubricating nuts & bolts, it used to be used on old copper head gasket, but when used on modern head gaskets it with stop the sticking affect, the blue ring around each hole in the gasket glues to the block & head. My cousins A15 runs 14:1 compession in his litre sprint car & often blows head gaskets. I've herd that Larry perkins araldited his heads on???
Trev