in response to exeter acres ?, go to www.fmadirect.com. also im pretty sure theres good info in these forums. while Ihavent put my first low wing in the air yet,(H-9 .60 corsair) im weighin the pros-n-cons of the co-pilot,and am interested in there recievers. heck, that FS8 co-pilot, reciever, failsafe unit is packed with features. good luck, Ted aka, flip-flop-fly!