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RicodJour

wrote:

The principle used here is transference. However unlike using lipstick
or carbon paper, you do not have to lift the drywall to find the
outlet box. (Think of cutting an outlet box for a ceiling fixture.)
The pushpin outline of the outlet box on the drywall is exact. If you
want an exact cutout, cut outside the outline of the outlet box. This
eliminates the problem in using a Robozip that cuts the inside of the
outlet box but leaves the thickness of the outlet box to deal with.

You're fabricating a "problem" out of thin air!

You don't cut around the interior of the box, you cut around the
_outside_ of the box. The 1/8" zip bit leaves a 1/8" gap around the
outside of the box allowing some wiggle room.

R