Just bustin'. I get a kick out of flat spins, but on something without a rudder I don't think I'd look forward to them either. Standard spin recovery is PARE, Power off, Ailerons neutral (opposite aileron puts the stalled wing in deeper), Rudder opposite rotation until it stops rotating (wind up with both wings stalled), Elevator down after rotation stops to unstall the wings and get flying speed. Without a rudder your pretty much on your own. It could be prone to flat spins because the cg's back too far, try moving it up some. Or if you get the recovery figured out and down pat, move it back a little, that should put it in deeper, be a lot more fun (if you can get it out). One of the guys I know got a Duraplane flat once, didn't know what to do and wound up plopping it in flat. He won't spin anything anymore, but I thought it was pretty cool, actually didn't bust anything. Good luck.

Have Fun!

Mke