Hinge points have worked well for me, I use 5 min epoxy and do all the hinges in one surface at a time.

Put a drop of 3 in one oil on the hinge pin before installing. Bend them at the hinge line 45 degrees or so and sight along the length of the surface at the hinge points.

Align them so they are all parallel and in the same plane. As the epoxy jells use a new exacto #11 and pull off the excess epoxy that has squeezed out. (it'll come off in a chunk and not string out at the right jell point)

Operate them a few times as the epoxy finishes curing, then install in the flying surface.

It is a lot of extra work, but I like the Robart Hinge Pockets, too.
makes painting and repairs a snap!