A couple more things to consider:

Make sure your control system is installed so that if you pull on only one line you do not push or pull the control horn to the limit so that all of the weight is transferred to the stab/elevator.

If possible, you want the leadout positions adjustable. Different diameter or length lines will require different positions because if the amount of bow caused by drag.

It does not matter where in or on the wing the bellcrank is positioned, only where the leadouts exit the wing.

George