Yep, in the end a mild press fit and as you say no sealant on that one. I think I would use sealant just in case, but only a little.
We have done 3 cases, of which 2 are in use and one (the one in the pics) is a spare.
None have leaked yet.
Heaps of stuff in that thread on my 90, rebuild steps for the gearbox and transfer, suspension work, diff builds etc etc.. its all a bit of a mess and in no order tho so sorry about that!
I believe you can buy a case which has already been sleeved from MR Automotive. I think they may use a parallel sleeve, not the stepped one we have been using from Ashcrofts.

