Your problems sounds exactly like mine. I have the 46 size Giles 202 kit from GP and went down in the swamp Friday afternoon. Retrieved with minor damage. Post crash analysis revealed WAY too much throw on the elevator. I had it trimmed for good level flight and was making good passes. Once I decided to start the fun stuff, that's when the problem started. I went into a climb and at the top I started to pull backinto what was basically a slow loop. As the stick came back the plane violently snapped into a corkscrew dive, narrowly feathering out as it passed a line of trees and headed out into the swamp area next to our flying site. Credit two of my flying buddies for retrieving it for me Sunday afternoon. On subject, I will be making a few changes after repairing the damage...busted firewall. First I will balance it somewhat forward of the recommended CG and a little noseheavy. This plane feels very squirrely in a tailheavy config, IMO. I will also be lowering the throws via low rate adjustment on my radio setup. On low, I was still at 65%. Plenty of room for adjustment. Aileron throw seems very stable at max recommended throws, but elevator seems way too high. Good Luck and Blue Skies!