Originally Posted by
masher81
I am pretty sure that the beveled head of the 3x40 screw needs to "Lock in" to the rear hinge pin holder to keep it from moving.
Yes, that's true. The counter sunk screw was chosen to center or "lock in" the holder. The holder is also keyed to the chassis so that helps if you use the caphead screws, but you're right, it won't be as accurate as the CS screws.