SIG once made a popular .40 powered cute trike gear aerobat -I forget the name -anyway (Cougar?) these easily rolled with application of elevator -only big thick round leading edge -but like a lot of kits - grossly overweight. I once demoed this characteristic for an owner to clarify that even trimmed out - the stall coupled with ANT assymetry -such as engine torque - would roll with elevator only.
The new designs out of China are -believe it or not -often lighter -and better built-than many "builders" can do from scratch!
They won't survive vertical landings but then -what do you really want in a model?
Having custom built some of the scale kits on the market- it has been obvious to me that many kits especially the "warbirds are grossly overweight
On the other hand -they might be heavy but at least - they are fragile.