So I got a really good deal on a 365 and bought the XL grip module for it since I prefer it.

I'd read they had markings for the safety cutout should you want to add one (and I do), but mine is completely blank.

Suggestions for creating the cutout in the grip module correctly? Can someone provide caliper measurements for the cut width/depth?

Sorry don’t have any calipers but I can take some pictures of that would help.