I also use the 6-3/8" hole saw. I am not sure of the brand name. I got it from the big orange box for around $30-$40. I use a standard hole saw arbor. I start the hole in reverse using my 14.4V cordless to scar the surface and then put it in reverse for the rest of the way. I do dispise the dust thrown all over. But it is quick and neat.
Blessings, Mark
