Place the Arc Mark Target, with the magnet face pointing down,
in recessed light fixture. For the 6" inch recessed light
fixtures locate the target over the head of the assembly screw
which is located in the center of the recessed light fixture
adjacent to the rafters. Make a mental note of the orientation
of the Arc Mark Target relative to the direction of the rafters.
Once the Arc Mark Target is installed in the recessed light
fixture, cover the recessed light fixture with the drywall.
Position your drywall in the exact location and fasten it with
enough drywall screws to make it secure.
With the magnet face on the Arc Mark Locator facing up, pass
the Locator across the area in which the Target is located.
Try to keep the Locator in about the same orientation as the
Target. Find the Target and snap in place. Do not force the
Target locator into position. Hold the ides of the Locator and
let it jump to final position on its own. Then, take your pencil
and mark the outside radius of the Locator.
Remove the Arc Mark Locator from the drywall. With a quadrant
of the circle marked, visualize the entire circle. With your
spiral saw plunge the tip of the bit cutter into the drywall
on the outside of the line at the middle of the line. Move the
tool slowly towards the center and counterclockwise 360 degrees
around the recess light fixture.
Finally, remove the drywall cut out and the Arc Mark Target.