Nice!!!!!!! Have some 1/4" lexan left from a project at work and think I am gonna make the rear widow for my Uforce myself. $250 is a lil steep for one. Where did ya get your tube clamps? I fab bed two to support the top off my windshield to stop rattling out of 1/8"X1' aluminum flat stock. They turned out nice but just took a while to fab up.
I picked them up at a place called fasten all they have clamps, nut , bolts etc. Basically they are the same as the ones at lowes but rubber coated. If you don't have a fasten all place I'd say get the lowes ones and they sell the rubber dip stuff there, mostly used for dipping hand tools, but would work just the same.
If you're adding lights or switches, I can send you the link for my switches (eBay) things are a PERFECT fit for these dashes.
Thanks again for the compliment.