This little ripper has made things really easy with stringers in concaves. Not cheap but very good quality and easy to use.
The item got to my house faster than I could believe. Once I put it to work it would dig into my finished product more than normal. May be a user error but I have now gone and purchased a curved Japanese planer and it does not dig into the board.
This is the way tools used to be made. Made to last a life time great little product, almost a piece of art, love it.