Welcome to ScubaBoard, the world's largest scuba diving community. Registration is not required to read the forums, but we encourage you to join. Joining has its benefits and enables you to participate in the discussions.
Benefits of registering include
I'm thinking about using the glass from a photographic UV filter, adding a shim so it doesn't touch the dome, and epoxying it into place. I hope that the minimal(?) air space between the dome and the glass won't be enough to crack the glass at depth.
?