In my experience with the T-max I got varying results. I bought two of them, one worked great, the other not so much. The one that I had problems with would hit weak, like the carto/atty wasn't making full contact with the firing contact. The thing is sometimes using the same carto would deliver different results. Sometimes it would hit great, other times it would hit weak. I would pull the pin on the carto, and it would work fine for a while, then back to hitting weak. Way too much fiddling for what I wanted then. The one that worked great still works like a top.
Another thing is that the T-Max is HEAVY! With an 18650 battery it weighs in at over a pound.
Just my