Think we're talking two different things here:
1. Which cause's less foot damage? Centered of course.
2. Which will hold a 1 in a 100 toe caught's that would other wise escape? Side mounted but on bottom of trap.
I also feel a trap slides a certain amount even on centered traps until it gets it's final 'lock' on the foot, why most times if the animal is going to escape it's done in that first big lunge it makes after the trap first fires.
Quitting Tman is the new adult version of running away from home. We all know your doing it for attention and will soon come back.