I need advice on setting up my router to do the binding. I spent a harrowing time over the weekend routing the binding channel on the octave mandolin I am building using my Dremel with a StewMac attachment. I got the job done, but not as clean as I would like. I had to cut a bit by hand to avoid chipping into the grain. I have seen photos on the web showing how a regular old router can use a simple jig/guide built of wood, but I would like to know if bit size matters and if a certain type of bit is preferrable. I would assume that the larger in diameter the bit, the faster it moves and that should be a good thing--right?