Man, Mike... thanks a heap!
Thought I'd have a prob when it wouldn't fit on my 3/8 drill, but an adapter, socket, and 10 minutes of use, I'm ready to pass on the 1-1/4. It was just too easy. The saw is pretty much self centering, and will take out the center narrow pipe (that creates the dreaded 'popping'). I had to dig out the first one, but the 2nd came out in the center of the saw. The adapter and socket will go with it. Who's next?