OK, so I'm building a 3646 Deco Bezel with a black 'MM' dial. I got the watch from Davidsen. I cracked the plexi 'crystal' and he supplied me with another, but I can't figure out how to fit it. The old one easily pushed out from the inside, once I removed the movement. It has a thin plastic/neoprene gasket around its outside diameter that obviously creates a pressure fit between the case and the plexi. The new one comes supplied with the same gasket but I can't get it and the plexi face into the watch body. What's the trick? Do I put the gasket into the watch head and then somehow (how, please?) squeeze the plexi face into place inside the gasket? Do I leave the gasket on the rim of the face and squeeze them both home into the body simultaneously--how? I'm sure there's an easy trick...... incidentally, I put the replacement on the caliper and it is the same size as the old. Thus the problem is with me, not Davidsen. Help much appreciated!