Stabilize M14_mount_rear_2020base against rotations

[JakobPetersson]

In my experience, the M14_mount_rear_2020base_v2-part does not fasten completely in its current design. It will shift vertically depending on pressure, rotating around the M4-screws.

Possible improvements:

• Add the raised middle "band" that fits into the alu-profile (v3 & v4)
• Two M4 screws on each side, instead of just one (v4)

Both of these design choices already are in the other 2020base-parts and stops them from rotating in relation to the alu-profile. Example: M14_mount_right_2020base and M14_mount_left_2020base.

I cannot personally justify buying a Solidworks license just to contribute to this project once or twice. Therefore I can only attach a .stl as a suggestion.

It is up to you (the maintainers of this project) to decide if this should be done by updating the v2 design or creating a new version.

Todo:

• [ ] Make these changes to original design files (Solidworks/.step)

[julianneswinoga]

@JakobPetersson Understandable that buying a license is not feasible for small contributions like this. If you wanted though, SolidWorks does have a free community download for makers that you could try. Here are the instructions: https://reddit.com/r/SolidWorks/comments/m6hvc0/free_solidworks_license_for_makershobbyists/gr9mzdg/