Thanks! I've had premium for ages, but haven't really explored all the options
Edit: I'm not sure I understand what nonzero will do (is there a reference here in the forums?), so I use max. I tend to always add 1 (0.5 has happened, but that wouldn't be a problem), and so I will never get more than 1, and that is what I want.
Edit: Turns out that I also was blind last night.