I got a second Equinox and that gave me a coil I could mess with since I now have a backup. I have not done this before and so can't vouch for this per se until I use it some more to see about longer term durability. I started with Lexan Sheet - Polycarbonate - .030" - 1/32" Thick, Clear, 12" x 12" Nominal from Amazon $6.89 delivered. I was quite tempted to use 1/16" instead but Lexan is tough so on this first go I went with the thinner 1/32" to keep the weight down. Outline with marke