Open source SpaceMouse - Modified frame to fix joystick position

Adjusted the position of the joysticks so they align properly.

Before (original model):

With the changes:

Adjusted the position of the joysticks so they align properly.

The following joysticks were used:

https://www.aliexpress.com/item/1005006534261201.html

Screw holes for the joysticks have been enlarged to 3.5mm to use heat inserts:

There are two models attached:
- The first one has the bottom cut off in order to built a thinner version, and is missing the hole for the cable (I did not put it back in after cutting)
- The second one is the full original thickness  and still has the original cable hole.

I published this upon request, see the original discussion here:

https://www.printables.com/model/864950-open-source-spacemouse-space-mushroom-remix/comments/1792760

UPDATE: Printing artefacts were reported on the first version, so I am uploading a new model (v1.1) which reduces the holes for the joysticks from 4mm down to 3.5mm deep. Please use this version!