I've been meaning to. Looking at the sheets, it seems thermally it would work.
The reason I haven't yet is that guy will just not out and out sell one, I keep meaning to watch the auctions and then they go too high or I forget. (I always bid late). I emailed him a couple weeks ago (and why I wanted one) and said how much do you want for one and could you just post one "Buy It Now"?
He told me
1. No, but by the 4x4 to test
2. Probably be better using the teletype class, which I'm not sure I agree with.
Either way, it's on my short TODO