and a sneak peak of this month sotm entry
SFT on left. NXT on right. the hole with air ways is tapped on the NXT just like the SFT. the second hole is the NXT va screw.(im sure you know this)
the NXT screw hole is approximately 0.215" in diameter and approximately 0.190" deep(measured from the end of screw to the first exposed thread) 0.180"-0.185" will give you a hair of room for error.
the center of the NXT screw hole is approximately 0.350" form the edge of the underside of the body on both sides.
the holes are approximately 0.470" from center to center OR approximately 0.350" from the center of the screw hole to the edge of the second hole (edge nearest the screw hole)