Better Big Einsy Case Prusa MK3S+ with RPi Zero mount, cable organizers, frame mount - no supports!

The original Big Einsy case is a great idea, but it was imperfect from my point of view: 

- used too much fillament
- had ugly vents
- it was difficult to route the cables in there
- used countersunk screws for the lid
- did not have place for RPi Zero 2

Hence I took the other STEP file Big einsy case and pretty much reworked it from scratch.

It now features

• place for Rpi Zero 2
• breakout slots for all Rpi ports
• Easy printing without supports
• Uses only M3 screws with flat head (except for M2.5 screws for RPi)
• can be screwed on the 3030 profile to increase frame rigidity (optimal nut model provided)
• Uses way less material
• Has optional connection for MMU unit
• Easier mounting due to cuouts for screw heads
• sufficient space from bottom of the board for additional TMC2130 heatsinks (1cm clearance)
• screw-length tolerant design - for most holes longer or shorter screws work just fine

Printing instructions:

• Note the orientation of bridges on the long cutout - in my case the slicer default was on the long edge, which resulted in bridging in thin air. Rotating bridges by 45degrees helped in my case.
• Other than that, just do whatever you want, basic 0.2mm layer setting is just fine
• The nut in this model is 1mm shorter than the original model - you need to print my version for correct functionality

Material needed

• M3 square nuts thin (DIN 562, the same ones as the rest of Prusa printer) 10pcs
• M3 hexagonal nuts 4pcs
• M3x10 or longer screws 18pcs
• (optional) M3x18 for MMU cable attachment 2pcs
• (optional) M2.5 screws + nuts for RPi Zero 2 2pcs
• (optional) M3x10 screw for the frame-mount nut

Mounting instructions

• insert all the square nuts, as it is easier to put them in before mounting (the one for X axis cannot be put in if case is on frame)
• screw partially the two screws on frame closer to bed
• (optional) screw on loosely the 3030nut on the case, as it is difficult to put it on later after case is on frame
• mount the case
• route in all cables, close the lid and you are done

Original onshape model if you wish to make edits is here.