Hi there, I'm new to this business, just got my kit yesterday.
Doing my first groove today I had my dremel go ballistic on me (jumping all around the place) causing a mess on the plate and messing up my groove.
It is a cheap unit and the brass insert in the chuck that holds the bit got chewed out by the pressure I guess.
The bit then sat crooked causing it to go all over the place.
Moral of the story, do yourself a favor and buy proper good quality tools.
Ron asked me to report this so here it is