Ive got a replacement jewel coming. I'm also replacing the actual date wheel while I'm in there. Looking at the Yuki date finger I replaced, I can't really figure out how it worked. Now that I replaced the finger, it changes over, but not rapid. I'd imagine the date wheel itself doesn't have the grove to jump as the date spring pushes against the lever.
I'm not entirely happy with the crystal height. I used a Clark 2.7 gasket at first and have gone to a 2.85, but it still seems to sit low. Both were a pain and needed a bit of sanding to get the TC retainer to fit over them. What gaskets are everyone using for TCs with gen crystals?