I've taught folks how to do that for years but I rub the pencil lead on
my finger then rub my finger over the paper to make an impression of the
openings. It comes in very handy when mounting Cisco routers on
backboards since the mounting holes are asymmetrical. ^_^
Another solution is to buy powerstrips with symmetrical slots.
Every one I ever put up had symmetrical slots, so just measuring
center to center with a tape worked fine.
But it's a good idea. I cut a lot of gaskets for flanges using a ball
peen hammer on gasket material laid on the gasket.
Probably wouldn't have thought of this.
Would have used a tape.
...assuming the printing technology is present at the time and place
you want to mount the strip or that you thought to print out the
template before leaving for the job site.
Seems to me that you can always find a piece of paper and a writing
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