I have done several 3-line set-ups on both carrier and scale models. I do mine so that pulling on the elevation lines give full throttle. This actually lets you fly the model with only 2 lines and wide open throttle. I make up those two lines first. Then I make up the third line and set its length so that the throttle just barely starts to close with the trigger in the fast position. Fine tuning of line length can be done with different lengths of line connectors. I was never successful making up lines to the exact lengths shown in the handle instructions.

I have converted at least 4 R/C kits to C/L scale. No big deal, just add a good strong point for the bell crank. Top Flite P-40 gold edition with a Super Tigre 75 flew very well, but a Skyshark Val with ST .61 was even better. Those were on electronic controls. Also did a Typhoon with Fox .25 and three-line. Other three-line scale model was a scratch built F-5-F with a pair of .25's.

I have a handle and several bell cranks listed in the classifieds on stunthangerdotcom.

Where are you located?

Chuck