dr wogz has it generally right. However unless you have a good bit of experience flying R/C, I believe you would be better off cutting the wing and building in a little dihedral. If converted with a flat wing, even though they might fly, I believe they would be a significant challenge to a beginner. As to the cg, if I remember correctly, the cg on C/L aircraft was quite a bit further forward than a free flying airplane requires. 25%MAC is the most forward it should be.

Remember that without throttle control, every flight will be flat out and every landing will be dead stick. A better choice would probably be to build in some dihedral, use the rudder for primary flight control, and put the throttle on the second channel. The throttle can be used to make the airplane climb and descend, and will give you control over landing. A variety of aerobatics can be done with rudder only control including snap rolls, loops, spins wingovers, etc. They will certainly get a more vigorious workout than tethered with a wire.