the oven plan did not work for me, as the glass i bought is just a few inches too big to fit*. that said, i'm seriously considering this:
http://vinylflat.com/vinylflatproducts.html

$100... supposedly works like a dream, with or without the $50 plug-in temperature bag, and is a lot safer than handling/storing two pieces of unprotected glass.



*TWSS