I think I know what you're describing, but some photos would be nice. Sounds like SFG's, side force generators.

I've flown this model at a weight of 7 lb 0.7 oz and did not see any undue snappiness, although of one pulls the elevator hard enough any model can be made to tip stall. But lighter is nearly always better. I maidened a buddy's kit-built GP Extra that was very heavy - was extremely touchy and snappy, and was lucky to get it back down in one piece. Tapered wings do not like high wing loading.

I'd also like to see your covering scheme. I'm using the Aeroworks silver/red/black as a guide, replacing the black with midnight blue.