Overshooting right side of cut and cant figure out why

[theworkshope (Dan)]

This is essentially the method I would use. Sorry I can’t come up with any better answers at this point, but worth trying out the measurements again and then see if anyone else has ideas after the holiday.

So many scraps what to do

I do the groove last. Get the board done and make sure it has perfectly square corners. If the corners aren’t square then the board is effectively a parallelogram and the juice groove is a rectangle, and when you cut the groove it won’t be parallel to the edges of the board. I dimension cutting boards on my table saw because they are almost 2" thick. But you’re on the right track - if you can dimension it on the CNC and then cut the juice groove without removing the board, you’ll be assured …