i know it should be installed by someone who knows what they're doing, and it will be, but i'd like a guide on whats involved, so i know what parts its likely to need, tolerances etc.

anyone know where to download one?

perhaps this will be of some help?

linky

although not specific to the atlas, that looks like it'll do the trick! cheers fella

like i say its just to get an idea for myself of if the gears are any good, what shims i might need etc.