Pads might be hard to come by for Mags unless you go to an MTB specific shop, and even then... The £6 sintered ones on eBay or from Superstar are good in my experience.
Thing is, they should be self adjusting for pad wear, so even if you are down to the backing plate the bite point will be the same. It sounds like they need a bleed or need to be 'mobilised'.
Pads might be hard to come by for Mags unless you go to an MTB specific shop, and even then... The £6 sintered ones on eBay or from Superstar are good in my experience.
Thing is, they should be self adjusting for pad wear, so even if you are down to the backing plate the bite point will be the same. It sounds like they need a bleed or need to be 'mobilised'.