Be aware that converting a small *heavy* Guillows kit to RC is a difficult exercise.. it may be impossible to build it light enough.
*.......* :The spar balsa supplied with Guillows kits is like pine! If you replace all those heavy spars with contest balsa you may have a better chance.
Here is a useful thread on trying to obtain lightness:
http://www.rcgroups.com/forums/showthread.php?t=993275