Randall, I would be cautious about the round bottom of the tool, it would tend to roll and Square corner inserts are easy to get a catch and blow a blank, or twist unexpectedly, and go flying.
Also Woodchuck inserts may not fit this tool, I think it uses a 12mm insert same as the Easy Wood mini tools, which I hate to say, is a much better tool than the Rockler version.
The comfort factor in having EZ woods 7/16 square bottom or the 1/2 inch square bottom of a Woodchuck coupled with the radiused inserts makes a world of difference.
I'm not pushing the Woodchucks, and sure as heck Ain't trying to make any sales for Craig, but I'd think about it and actually get the tool in your hand.
It's a convenient size, though the handle looks a bit puny, see what size inserts it uses, Woodchucks are 15mm for the R-2 and R-4 radius and one square,but I don't recommend the square insert for small work, only roughing large chunks, like bowls and big spindle stock. unless you just do bushing to bushing straight slim lines.
They will destroy blanks, particularly acrylics, there is too much surface contact with them.
Now it would be a dandy little tool for doing tenons, but a good parting tool does that better and cheaper.
Please note, I am not trying to promote any tool just set some information regarding a tool.
Ken Ferrell