I also support the dremmel. I use it too.
Getting your dog used to the dremmel. Its a multi step process. You don't just sit the dog down and go at it.
When I first started, I had Bacca next to me and just let him sniff the dremmel. Then I put it behind my back and turned it on. Waited for him to settle, then treat and reward. Then I brought it out and turned it oand n. when it settled treat and reward. Then I touched his feet with it off and then turned on....treat and reward.
Touch a a nail with it turned on....treat and reward....You can see the progression. It only took about one week for Bacca to settle with the dremmel. No, he doesn't like it, but he puts up with it.