RE: Going CL with tis R/C model
I would try to incorporate an adjustable lead out at the wing tip as this can be used to adjust line tension. Regardless of whether it is CL or RC, the CG relates to the airfoil being used. An airplane needs to be balanced properly to fly right. Get the CG at the thickest part of the airfoil.
This should not be a difficult conversion. You just have to mount the bellcrank properly, even if this means adding new structure inside the fuse.
Of course it would be best to have it mounted in the wings between rib bays near the spar. It may require some major surgery to do this though. Especially if you have to make holes in all of the wing ribs to run the lines out to the tip.