Caveneau - thanks, I'll keep you in mind.
P00k - I haven't looked into the leading for the faux stained glass, but I definitely will, thanks for the idea.
Talen - excellent question. From what I can gather, there are a number of different zpms that were used during production. It was pretty much impossible to get exact measurements/details because there were so many different versions and it was pretty much impossible to figure out which screenshots/photos were which zpms. So, I decided to take the overall dimensions and take elements from the most prominent screenshots and, on the premise that every zpm is different (in Stargate lore that is), make one that incorporates elements of all the zpms that were seen, but is unique in itself. The plan was to take a 1x4 poplar board, rip the general crystal shapes down on the table saw, glue them in a circular shape and then build it up from there with accent crystals at different heights. I built up the lower section with modeling clay and got most of the sharp edges using a belt sander.