Hi Marc,
Thanks for sharing your diy project. I'm trying to make a 9" or 11" dome port for my ikelite housing. I'd already made the extension. All I need is an acrylic dome which has at less 0.25" thick. Could you tell me where did you get your dome?
Sorry I didn't get back to you sooner, I just noticed your reply.
I tried looking around for the original receipt for the dome but could not find it.
It's been years since I bought this dome and when I did, I bought many different sizes in quantity.
I can tell you I bought them from a Compass repair company from the New England area..
Don't be surprised that it is a compass dome. Most dome ports in old days originally came from compass dome manufactures. You have to be very selective when your shopping around for a good quality dome. That's why I bought them from a compass repair company. Most often they can tell you who's domes are of a better quality. Just make sure you tell them what your using it for.
I've had very good results with many that I've bought over the years. If I remember correctly I paid about $45.00 For the 9.25" domes and $35.00 for the 6" domes. In any event you haven't got much to lose if you give it a try. Try searching the net for compass repair.
Best of Luck,
Marc