You guys are wicked overthinking this. You’re not building an airplane, even then, we left a little slop in the holes… The tool mount and nut trap are clamping each other through the pipe. If the holes are off a little bit, it’s not going to make that much of a difference. Most emt conduit is welded, use the weld seam as your line, mark the hole locations with a finish nail through the tool mount, if the nail makes a good divot, that’s really all you need for the drill bit. If you’re using stainless, then there probably won’t be a weld seam, if that’s the case, lay the pipe on a table with a piece of half inch plywood beside it, use a sharpie to draw a line at the bottom of the pipe, do the nail punch through the tool mount thing again. You’ll probably need to whack it again after moving the plastic part, or do the dremel X method, then drill the holes.
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