Brake pad wear

Appearantly the pistons went back in okay. This is very likely from lack of lubrication to the slide pins and where the pads rub against the cailiper bracket.

These need to have thae tin hardware pu=lled off , wire wheel the bracket, the tins clips, the pins cleaned and lube. Lube anything that is touching with high temp caliper grease.

This probably isn't the same as yours exactly, but you get the idea. I only like the above product.