DJI Phantom 3 Standard remote control stick protection

I recently bought a DJI Phantom 3 Standard drone. I love it! I also bought a backpack to carry the drone.
To make sure the remote control is not damaged (and I think the sticks are the weakest parts), I designed a protection cap that can be placed over the sticks.
The cap snaps to the eye on which you can hook a neck strap. In this way there is no need for an elastic band or anything else.

I designed this with OpenSCAD and have included the code (not very readable this time I'm afraid).