While you can argue that raising (reflexing) both ailerons is truly washout or not; it's a fact that doing so helps prevent tip stalls.
http://www.mnbigbirds.com/images/PDF...%204_21_12.pdf
http://www.nextcraft.com/highlift_bill_harris.html
http://www.rcuniverse.com/forum/aero...on-reflex.html
http://www.rcgroups.com/forums/showthread.php?t=295990
I was happy to buy my Mustang on sale at Tower for $199 with free shipping. I'm waiting for another sale like that.