Another question for you, what was your reasoning for using 40 guage vinyl? I'm looking for smoked or tinted vinyl since everything else on my car is black and I've always hated the clear back window with tinted sides. So far, I've only been able to find 30g tinted vinyl
http://www.allvinylfabrics.com/Clear-Vinyl/Smoke-Clear-Vinyl/30-Gauge-Smoke-Clear-Vinyl/276.aspx