Camera bed mount modified for narrower enclosure arms

For a long time I used Petclaud's camera bed mount on my MK3, but completing my lack enclosure meant having to look into other options.

After designing thing:3666923, I discovered the vertical arm/pole from Petclaud's mount was slightly too wide. This is a slightly modified design of that vertical arm, meant to be compatible with my camera Enclosure as well as Bogdanko's camera enclosure.