Ultra compact Core One MMU3 Community Version

I noticed the builds of PrusaGuy, 3DMakerNoob and Sam and noticed some strange solutions.

For one the platform they make in all their builds seems useless to me. There is a plate already with the top cover. So lets just make a small hole in that plate for the ptfe tube to pass trough. See drawing for details, i used a new sheet in my build and lasercut, but you can modify the original plate as well.

Also, they attempt to place 5 materials up top, but they make it stick out of the core one's frame and don't allow the use of a 2kg spool any more. I solved this by placing 4 spools up top and 1 on the original spool holder on the side. This way i can still place 2kg spools on the side and 4 spools up top.

The angle of the MMU unit in the community builds became vertical, but this blocks any visibility and blocks maintenance. I found placing it under an angle of 45 degrees is a good middle ground between the prusa enclosed solution and the community version. This way the original power and data cable is long enough, and also the ptfe tube only needs a length of 40cm like the enclosed verion.

Only downsides: There is an extra hole in the top plate, so a bit more heat is lost. 

The upsides: Even more compact, way less material used, minimal conversion needed.
The complete print and build only consumes about 1.2 kg of filament (compared to 4.5 on the original).

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To clarify some of the solutions used.

The top plate gets a cutout for the ptfe tube to pass trough (i made it a bit bigger than it needs to be for now), and a 5mm hole for the ptfe tube from the side filament holder to pass trough.

The rails are installed on top of the core one's top plate. They are fastened by 2 bolts on either end. Optional 8 magnets can be installed to hold down the spool holders.

The bracket for the MMU is screwed onto the back of the core one using two holes that are already there. The bracket is angled at 45° and has a slot so the MMU can be taken off easily.

The sliders are mounted onto the MMU unit itself and slide into the bracket.

The filament holders (4x) hold the filament, have a passtrough hole in the bottom and feature holes in the bottom as well for magnets if desired. 

The Filament buffers are mounted to the sides of the filament holders, and house the original buffer wheels. 
The outside one filament holder gets a double stack of filament buffers to also buffer the filament from the side mounted 5th spool. Its ptfe tube is passed trough a hole in the top plate to this buffer.