Quoted from cfh:

The bottom line, and a point that you guys seem to all be missing is this. For the last 40 to 80 years all these stepper units have done nothing but reshape themselves. All the stuff was designed for five year life cycle. Stepper rivets are not made of tungsten or hardened steel. They’re fairly soft. They’ve been reshaping themselves, all by themselves, throughout their history. So to think that you could just take a Dremel and clean them is just BS. It’s just not gonna work. These things need to be sanded. Otherwise you’re just propagating the problem that they’ve created all by themselves over the last zillion years
The dremel is a good tool for some things. But for a lot of things it’s just not the proper tool. And someone that thinks that the Dremel is a magic silver for every problem it’s just either inexperienced or in denial

Quoted from NicoVolta:

Tim Meighan has my full respect. His games play perfectly... he's also a meticulous rebuilder and it shows. Was great to meet him on the pinball tour.
Go to the next NWPAS if you can. He brings a lot of his personal EM's to the show and they play great!

Quoted from cfh:

Notice in the picture of me "sanding" a stepper unit, there's a dremel in the background, in its re-charge stand.