As the title says, I'm trying to make several, evenly spaced grooves around a 3" OD PVC pipe. I've tried setting fence on table saw, and using the miter guide to align pipe, but it tends to slip. I also tried a dremel with router bit and straight edge guide attachment, but again, it tends to slip. I'm thinking the table router is going to be the way to go, but I don't have it set up yet. But I'm still foreseeing the same issue with keeping the PVC perfectly still so the lines are really straight. I'm thinking some kind of jig, but not sure how to make it and couldn't find anything online. Any suggestions?