I'll be building it out of the pink foam insulation.....its about 2" thick but on the finished product the edges will be beveled. http://www.youtube.com/watch?v=sGWF7QTZZi0 [/URL] I got the idea from this video. For the roll rates and speed I'm looking for something in between that can do a little high alpha.
You should look at Experimental Airlines on youtube. This guy does some pretty good delta wings. I made a couple from the same plane and the airframe only took me about 45 minutes to build. The rest was simple too and all of it was made out of dollar tree foam board and packing tape.
Here is a two videos of it in action. I used a 3400kv motor running a 4s 1300mAh battery. 5x5e prop too.