Did the Dremel just not make it spin very fast? I can imagine that.
Either not able to spin at all (which I think is probably very bad for the motor), too slow, or not enough pressure to actually do any damage.
Like I say I think it might be alright with a drill perhaps. My dremel was £20 or something stupid.
Yes it sounds like your dremel was just a bit shit. A decent 'entry level' drill is about £150, including batteries and charger.
@frankenbike started
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Did the Dremel just not make it spin very fast? I can imagine that.