Eachine Gimbal mount for F450 quadcopter

I was searching for a simple way to attach my gimbal to quadcopter so I came up with this design. You can see on images how it's mounted, yellow thing between printed parts is just a normal sponge for dish washing, I found out that it absorbs vibrations a lot better than black rubber on gimbal, so why not make an combination. Of course, sponge is glued with hot glue.

It's printed in PLA with 0.2mm layer height, slicer was simplify3D.
You can see that one part has metal inside, that's a bit