Originally Posted by
alfat33
Thanks Paul, kind of you to post so comprehensively. I have a digital calliper but I can't measure the original crystal as it is completely the wrong one and practically fell out. That said, if they are all standard I should be OK, but I'll measure the aperture in the case first just to be sure, before ordering from Meranom (as they seem to be the only people who include the tension ring).
Does the tension ring go inside the crystal? Before or after it is pressed in? From what I've read all of the Amphibias use the tension ring.
As for seals, the back seems very straightforward and the kit also includes an o-ring for the crown and a couple of other small seals that I haven't figured out yet. I still can't quite believe that the crystal will seal against the case without any other sealing required. I know the Amphibia model of sealing increasing with pressure, but I'm thinking that at 1 ATM, the slightest gap between case and crystal will allow water to seep in. I guess it comes down to fitting the crystal properly to a very clean case.
I appreciate all of you being patient with my DIY efforts.