I have been trying to figure out how to do the inside ream and outside chamfer for some now other than by hand. I have thought to get a case prep center and always stop after looking. It would be nice to get the reamer and chamfer replacements part to use in a drill. I have an older bench mount pistol grip type of drill motor from the 50's. This was designed for the home handyman as a drill or snapped into the frame, a bench mount for home projects. It has low rpms and a terrible chuck, but it works. I have been chucking up the reamer easy enough but still doing the outside chamfer by hand. I purchased a used deburr tool at a show with intentions of modifying it to work in the drill. No go. To hard of steel to drill thru on my drill press. As I kicked around ideas, I decided to take the neck/shoulder reamer out of the adapter that I use on .223 brass. The Possum Hollow from Midway. The standard deburr tool will fit in that Possum Hollow adapter that I bought with the neck reamer. You loosen up the allan set screw and slide the deburr tool into the adapter and run all the insides first, flip the deburr tool in the adapter and do the outsides. It cleans them up as fast as you can handle the brass. I also run a primer pocket cleaning brush on a short stem for cleaning primer pockets. I made a small shaft (not really needed) and use the same drill to clean them. Oddly enough, this does not bend the wires in the tool like hand cleaning does.