Just bought some Hitech 6985HB Karbonite gear servo's last week (brainfart), and then did the research only to find out that Hitech does not recommend them on a plane over 12 lbs. unless the servo's are used in multiples per surface, or a gas engine. Man, how did I miss this one? Have to send them back now, don't want to chance a stripped servo on a new bird. Glad I found this out now!!