I have the Sig Cap 231 and it has no snap tendencies at all. You might want to check you CG. Also check you ailerons at the neutral position and make sure they are both aligned with the wing. If they are on the low side that could aid in the plane doing a snap. If you have a computer radio you can program in having the ailerons a little on the high side during approach. Between trying that, CG and elevator throw you can experiment at high altitudes to see what combination works best.