Just my 2 cents worth and I'll give you change if I charged to much.

I just switched to the Robart hinges. I'll never go back the the flat pinned hinges I had used. I did look at the hinge pockets and the first question that came to mind was WHY. It is an additional level of complexity, read another failure point. Are you really going to switch ailerons on a regular basis?? If so, you don't want soft plastic locked with a set screw in a soft plastic pocket, but at least an aluminum but more likely a steel hinge setup. Plastic doesn't take kindly to repeated screw clamps. Aluminum is a little more forgiving, but to have someting you will change regularry, you need hardened steel.

As for the holes being off, either in alignment or depth, it means you have to have a more precession setup to install them, and make the changes in the air frame to accomidate them. IE a hole in the surface to get to the set screw.

I guess it all comes back to my first question, WHY?

Don