Ok, for a perfect Trex 450 headsetup; what is the correct (mm) length from the center of the servo output shaft to the center of the ball-link for all the cyclic servos on this heli? ( I am sure the 3 might be slightly different, but I want to make sure I am close).

I don't think Finless address this in his video; only that the servo's need to be at 90 degrees when your at center stick on the radio.
And the manual does not say anything about it either.

FYI - I am using the Trex 450 V2 with the metal head and HS65MG servos - All are centered at 90 at mid stick on my DX7.

Thanks in advance guys!!!

EDIT: Oops, misread your question, never mind. [sm=spinnyeyes.gif]

I never measured it. After you find the arms that will give you as close to 90 as possible, choose the hole in the arm that will allow the control rod to run straight up to the ball on the swash. Alan

Actually, he does mention it in his video...at least for the HS-65mgs. He states 12mm and that equates to the 2nd hole from the end....

Skarn

Hmmm....

Maybe my memory is getting bad and that possibility is not out of the question....

IIRC, he says 13mm and the third hole on the Hitecs????

Didn't do me any good as I've got the JR 287MG's on mine and I went through three different servo arms before finding something I thought would work and those wound up at 13.8mm.

i thought it was 12.5mm out from center.

Depends on the servo.

LOL, it's quite possible it's my memory! It's either 12 or 13mm....13 actually does sound better. Original poster, don't listen to either of us, watch the vid again!

Skarn

Thanks guys, probably need a refresher anyhow.
I will at least check mine for somewhere between 12 and 13.

You are right; 2nd hole on one type of arm, and 3rd hole if the other lever arm that comes with the 65 gets the 90 degree alignment at center stick better.