Nope, haven't had time to look into it at all yet. I did manage to scratch the lens on my gopro though
I was goofing around in the parking garage testing out how well the stabilized gimbal works and had to set it down in a big hurry to avoid a concrete pillar. A glue join on the gimbal let go, and the camera fell out landing lens down on concrete.
I've been wet sanding and polishing the scratches away, almost perfect now. If I can't get it perfect I'm going to contact gopro and see about a discounted upgrade to a hero3 black.
Two lessons learned... 1) stop flying like a moron with big solid objects around and 2) don't fly with the lens 100% unprotected. I've found a place that sells clear stick on protectors for the lens that would've stopped any damage, so I'll be ordering a bunch of those just in case.