A bit late, but maybe better late than never. After occasionally getting an RC ARFor two over the years, I would reccomend definitely stripping the covering and looking closely at the glue joints. After having a number fail in the air, they often seem to have a cost containment dedicated to using a minimum of glue, and often what might be considered Lite Ply 3 ply wood in high stress areas that should have a good 5 ply. On one, with wing mounted LG, the bearer blocks for the torsion wire landing gear legs were mounte in balsa wood wing ribs with no ply backing. And the wire for LG struts often seems softer than what we use in this country. In fact, some years ago, a writer in the English publication AMI actually stated in so many words that for formed wire for landing gear and anywhere else a hard-drawn wire was needed, the only way to go was American Piano Wire from K&S.
Otherwise, thee should be very little problem converting an RC ARF to CL. Even if the base plane might seem a little heavy, the CL plane doesn't have to carry the extra weight of radio and batteries. Unless using on-board electronics for flight operations.