Hello mike,
I agree with you, for the ABC, but the doubler are not in ABC on my F16 kit, but in fiberglass!! no problem to attache the hinges. it's really strong.
DS 8911 = 25 kg and DS 8511 = 15 kg with 0.19 s /60° of speed, under 4.8 v ... it's ENORMOUS!!!
Regards,
Sébastien