Yes, at the start of the build the only material I could find with all of the proper fittings was plambing CPVC. Half way through I found another store that carries electrical PVC and PVC fittings (T's, 90's, etc...) that probably would have saved me about $10-$15 on the build.
Would it also be possible to drill holes through the plastic frame and put both the reflector rods through it as well as the 1/4" ID supports?
It's possible, but the small white tubes in the middle are used to set the gap spacing, so it would be more difficult to do this through the tubes, and I wanted to minimize the amount of holes in the main tubes to keep the frame strong. I also wanted to be able to take the antenna apart easily while I was experimenting with it, by loosening the screws on the outer cable clamps I can disassemble the whole antenna quickly and put it back together in the exactly the same. Going through the frame tubes would also need some other way to secure the tubes side-to-side.
What gauge wire are you using for the zigzag
10ga, but last time I was in the states I picked up some 8ga for my next build. This antenna's been outside for about a month now and survived a few heavy storms with no issues.
What is holding the outer part of the reflectors, wire ties ?
I used 1/4" cable clamps, the ones that look are shaped like a "p" (or "b", or "d", depending how you look at it).
Did she say if it was UV resistant or not ? If not, I would spray paint it with a thin covering coat for outdoor use. I personally wouldnt spray paint the driven element though.
She didn't say, but I assumed it wasn't so I took off all the copper and gave everything a nice flat black finish.
Here's a closer picture showing how the reflectors are assembled. The white tube in the middle of the reflectors actually has 2 turns of electrical tape around it to give the 3/8" cable clamp a nice snug fit, without the tape it was a bit too easy to slide side-to-side.