I bought a set of harbor frieght plug cutters and could not get the 3/8 plugs to fit my screw holes. The cutter burned even when going extremely slow in the white oak. I went to rockler and picked up another 3/8 plug cutter. I could tell from design alone it was superior. For one it cuts a tapered plug. Here is a pic of the rockler in the press and the junk one laying on the table.
Needless to say the harbor freigth plug cutters are going in the garbage. I’m so glad I finally got that figured out and here are the transom and stem plugs glued in.
-- Mike, Western New York