I would suggest checking unitedhobbies, for weight reduction use 1 ubec for lipo rx pack ($9, and you can charge it in less than an hour), and these servos:

https://www.unitedhobbies.com/UNITED...idProduct=5192

$19, 19gms, 4.7kg digitals... unbeatable

also, they Make towerpro servos, I have ordered a couple for ailerons (other model) 1was labeled towerpro and 1 was labeled hextronic