There are several methods to set the points, but I settled on using a small, corse file to taper the entry point and square it up. I set it so the hinge pin is flush with the TE. On the LE of the surface, I use a round bur about 3/16" diamerter and cut a 1/2 circle into the LE of the surface, Make it deep enough to allow the LE to touch the TE. You will have to square and taper the hole also, so it's a cut and fit job. taper and square, cut the semi circle, more taper and square and more cut the semi circle until it's just right. Go at the fitting slowly, you can always cut deper, and bigger, but you have a very dificult time uncutting.

This sounds slow and tiedious, but in I can do a four hinge surface in about the same time it's taken me to type this in. OK, I'm a little slow typing but still it goes quite fast.

I wouldn't shorten them at all unless there was a compelling reason to. Two ribs is the absolute minimum if every thing is fit well. Any slop in the hole, or a little excess finger prints on the point and two may not be enough to hold.

Don