My DP Ulty is powered with a YS FZ140 and flies great. I do notice, however, that the second half of the axial roll (from inverted to upright) is faster than the first half (upright to inverted). Much like an airplane with dihedral. Since the DP Ulty obviously doesn't have any dihedral I don't have a clue why it's doing this.

Anyone have any ideas?