Pretty much same as bolting to table but the holder is adjustable but you can also take the template off the holder modify it as need be and then put back on holder and it will be dead nuts where it was before. Helps as you want to fine tune the diameters. The holder remains in same spot and template bolts back on in same spot. If you have to take your template off to modify you are going to have to screw around with it to get it back in same spot. I like my fixtures to be as adjustable as possible for a wide variety of plugs. Same fixture multiple adjustments. I’ve probably made hundreds of fixtures over the years at work and that helps me in my visions of what I need especially looking down the road.