I've seen home improvement shows

1)cut a larger square (inch extra on each side).

2) Score 1" in in on each side on the back.
3) remove the 1" of gypsim from the back, so you have a 1" paper border
on each side.

2. Then use the 1" on each side as if it is the drywall tape and mud
all the way around.


Never tried this method but it looks slick. I usually use either 5
layers of mud till the hole is filled or your method.

c_kubie