RE: Sig Mayhem 3D ARF
I don't mean to get the CA hinge debate going (it's not the right place), but I'd like to make one comment. I believe the quality varies greatly from brand to brand. I've had great success with CA hinges, but almost never use the ones supplied with an ARF.
I only use SIG Easy Hinges. They are coated with a CA retardant that prevents thin CA from drying instantly. It allows the CA to completely wick throughout the hinge and soak into the wood better before it sets. Another benefit is you have several minutes to adjust the surface before the glue dries!
I highly recommend them.