Thanks amosguy. Luxor has countless extra holes & even in great condition isn't that valuable (not to mention iffy hardware) - I value it @ @ $75. So to cut a couple plugs out of it to fit into an 18" BD, with the same wrap darkening, makes a whole lot of sense. Chris
Then yes, a plug cutter bit will be the way to go. You will need some sort of drill press, and a way to clamp the snare shell tightly. Since plug cutters have no way of holding center. I would clean up the hole in the floor tom, (unless it's perfectly rounded) then cut your plug to the next size over (unless you luck out and there is a perfect one) and sand it to fit the hole in the drum. It would be easier I am sure to cut the hole out in the floor tom larger to match, but as the floor tom is the one you are saving, I would try to keep as much original shell there as possible.
All of this is assuming that your holes aren't too large. I use hole saws in the same way as plug cutters, I just remove the centering bit from the arbor, and you can cut most any size plug you could ever need..
Hope that helps.
Thanks, Ryan