I've meant to offer this little "how-to" photo tutorial many times but have always forgotten until I'm all through with the process. Working on the Hutchinson P-38 tonight, I finally remembered to snap some pics as I went.
I typically use Du-Bro pinned hinges. Everyone has their favorite hinges, the Du-Bros are mine. Theoretically, once they are epoxied into place they should be all good to go. Not having total confidence in that I developed this pinning routine long ago and have been doing it ever since. Once I have all the hinges glued in place and fully cured I go back and pin them all using round toothpicks.
First, mark a spot for a hole that will go right through the center of the hinge half. Next use a T-Pin and create a pilot hole down to the nylon hinge. You want to do that so the drill bit doesn't wander as you begin drilling. Drill first with a #55 bit as a guide hole, and then finish the hole with a #45 bit. Then get the required number of toothpicks ready, snipping them off and squarely "facing" them. I use a T-Bar sander...