Hello yaksplat.
I've been using the Bosch router.  It is pretty nice.  But I think I messed up my collet.  I was routing a groove with the plunge router, and so I was using a groove/flute bit naturally.  But the length of the cutter was quite long, so when I put the bit in, I backed it out 1/4 in (as they say).  But I don't think that was enough for this bit.  The cutter end of the bit went a fair bit inside the collet (because it is so long).
Anyway, sawdust got inside the collet.  So when I go to take the thing off, I end up taking the nut off, but leaving the bit and collet still in the shaft!  I know I know.  I probably shouldn't be able to even do that, but I did.  Anyway, I managed to get that mofo bit off, but I scratched the collet up pretty bad.
So I should just get a new collet/nut?  The main motor and shaft are fine.   Also, I assume that in the future I should always have enough of the cutter sticking out so that no sawdust gets inside, right?