Welcome to the new PGCA Forum! As well, since it
is new - please read the following:
This is a new forum - so you must REGISTER to this Forum before posting;
If you are not a PGCA Member, we do not allow posts selling, offering or brokering firearms and/or parts; and You MUST REGISTER your REAL FIRST and LAST NAME as your login name.
To register: Click here..................
If you are registered to the forum and keep getting logged
out: Please
Click Here...
There aren't any commercial square cutters unfortunately, they have to be bench made. Cutting proper flattop checkering is hair raising as you said, zero room for error. One slip and you're refinishing.
I don't think your forend can be saved unfortunately, doesn't appear to be enough wood to sand that mess out and start over. What a shame!