Gotcha. I plan on making a jig that will hold the riser clamped in with a locating dowels in the area of the riser that will get cut away for the grip. Mill one end, flip it, reinstall and do the other end. The entire jig will bolt down to the mill table and can be removed and set back up easily. Be able to nock out a few at a time.
That's the plan anyway.
I go today to pick up my bandsaw! Pretty excited on that. Got a 2.5 hp 14 inch Hopefully to use for resawimg as well.