I have 4 JR 591 servos that I have bought for installing in a GP Extra 300S with a Saito 125 engine. I had intended to use a 6v battery for this setup on Spectrum reciver for DX7, I have read that the 591 servo is not recommended for use with 6v and also not recommended for use in sport or precision aerobatic planes over 40 size.

I could swap the servos in my 4* 40 Spectrum DS 821, and install the 591's in the 4*.

Or just get a new set of servos.

Any comments?