Not sure why this is posted, but as an amateur aircraft builder, I have a love hate relationship with these things. On one hand, they're clearly very versatile and cheap. On the other, if there's a significant curve in where they're installed, it can be incredibly frustrating to get the pins in/out.

In some cases, we'll take the kit-provided hinge and put them aside. Instead, we'll use SkyBolt camloc-style fastners.