Swivel mounts fixed

Tried all I wanted, but the swivel "ears" never stayed on their base, because there was a gap in the model (see pictures).
Meshmixer and fixing the mesh didnt work, so I made new models.
Also fixed an issue with the camera mount not fitting into the top swivel properly, and reduced the bearing diameter in the hopes to close the barrel gap. Also fixed the hole for the nut being the wrong size (was 8mm hex, now 7mm hex).

Will keep on WIP until I have finished printing and confirmed that it fits well.

Update: Fits like a golve, at least from my printer. Also added some arms (50mm between holes), because I had to switch to another camera mount plate, since the one in the original wasn't fitting.