With a flat bottom exposed button, its not going to stand without firing without locking it(well maybe the 14500 without anything to heavy on it, but not the bigger simplicity models). Unless one puts a super stiff spring in, which I don't personally like.
I've tried so far a Mini Gen Ti, Kaifun Mini and a 16mm OD Titanide/Diver
tank.
I think the only heavier atty was the KM in
tank mode. In driper mode is not at all heavy.
I didn't much care about it's ability or lack of it to withstand heavier attys at ease, it was the too soft action that prompted me to try to increase it's resistance.
Anyway i got the spring where i like it, and if the mailman doesn't screw me over as is his custom, today i should be receiving the much desired Doc Dave Mini micro which i hope will be the nicest match from what i tried so far for the Simply.