mon trials are plenty powerful enough...tried a bigger rotor? bad blled? contam'd pads? it works fine.... joe seddon used one for ages with a grind yup, more leverage off the hub. KInda controversial that... less pad material would result in more pressure if you think about it, although large3r pads woulkd have a bigger surface for stopping and heat dissipation. Nope....it works fine, takes a very weak rim to be crushed by a magura.