I've done 2 PNP's, neither with the tool and I dont think you'll
eventually ruin something but here's below how to adjust it:
PNP installed, in neutral, but not fully tightened...
OK, there are 2 flats machined on the shaft (that comes out
of the tranny, & goes through the PNP) Line up the mark on
the housing directly in-between the 2 flats by rotating the PNP.
I held 2-6" steel rules on the shaft's flats to make it more visible...
(this is hard to put into words, but real easy to do) Then tighten
down the PNP and your done! Make double sure the PNP switch stayed
in neutral! Verify by moving the selector to reverse (with the key on)
and making sure the back-up lights come on.