ORIGINAL: ram_z
The JR 9401 is like a glove to the servo hole provided in the wing,
The Futaba servos (9154) are bigger so I think it is not worth the work to trim the servo hole to the servo it self.
Ram
As i said "like a glove".
I am not sure that 8401 will fit at all to the servo hole in the wing Because it is to big.
Regards
Ram