Monty,

I use a bushing with my dovetail bit and, yes, it does require that the bit is not seated as deeply. The bushing diameter is smaller than the smallest diameter of the dovetail bit so the cutting edge must extend beyond the bushing. If you will be using a router bit specifically with a bushing, then try to purchase a bit with a longer shaft.

I prefer a straight bit with ball bearing (same diameter) when pattern routing or flush trimming. When using a bushing for pattern routing or flush trimming, you either need to compensate for the difference in diameter of the bit vs. the bearing or, if you use the same diameter bit and bushing, extend the bit beyond the bushing.

L/W

“Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety.” Benjamin Franklin