Don't waste your time guys, the CWP bezel assembly doens't fit the Silix case , the case is wider than the bezel all around.
I tried a Tropic 18 in the case (some say it takes a T17??? I'm not sure) but it's too small and falls right out, the crystal would have to be glued.
I purchased an 8mm Brevet crown & tube from DSN for this purpose and I'm pretty sure it could be fitted (may take some work), the tube is considerably thicker and a new hole will have to be drilled and tapped. The one thing I'm not sure how about is how flush it would sit against the case, I haven't meausured the case to know how much room there is to countersink a hole for the tube to sit flush.