I have a porter cable that I have a 3” backing plate on and tbh I really don’t enjoy using it.
Never used a nicer set up for 3” pads, but I’m kind of at the point where I think it would make more sense to go forced rotation and have a 1” machine like the ibrid for the ridiculously small spaces.
I know a 3401 or Mille can cover a ton of ground, and I’d have to imagine whatever those machines couldn’t handle would be small enough to almost require a nano tool of some kind.
A lot of coin to part with though, which is why I haven’t bothered to try and unload my polishers and start down that path. Hard to justify the expense for a hobbyist, lol.
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