I decided to build the 30” [link=http://www.jetworksmodels.com./airplanes.htm]Ultimate Biplane[/link] out of BlueCor foam. If you aren't aware there is a huge string of posts from people that have built or are building this and similar planes [link=http://www.rcgroups.com/forums/showthread.php?t=240664]here.[/link] I'm gonna learn a lot building this this thing.