NOTE: This is meant for the K1 Max. If you are upgrading a K1/K1C use the other mount from Bootycalljones (linked below) 

Are you tired of running out of RAM? is your printer hanging up, or even worse, crashing? Maybe you'd like to upgrade your K1 Max to 48V TMC5160s for even faster performance! Open up all of the possibilities for your K1 Max with the Bigtreetech M5P with CB1, a compact, yet very powerful and feature rich controller board. 

This mount places the M5P in a comfortable place where your stock board was, before it let you down for the last time. The board is rotated 90 degrees so all of the ports are accessible and able to reach with the stock wiring, with only a few modifications needed to adapt the SSR to the M5P. 

I have optimized this mount for FDM with ASA, but have not scaled for shrinkage. Scale/input shrinkage % in your slicer. .step provided for you to modify to your liking. The mounting pegs are chamfered to fully support them. The corners are rounded to prevent warping. The inside is holed out to save on filament, but also to be strong. 

BOM

• 4 ea. M3x5.7 or M3x6 heatset inserts
• 3 ea. M3x35 SHCS
• 1 ea M3x8 SHCS 
• Bootycalljones M5P fan cover (no board mount) https://makerworld.com/en/models/200715
• 4 ea. stock board mounting screws

Tools needed

• Soldering iron or something to install heatset inserts
• Metric hex key set

Recommended print settings:

• 0.2 layer height
• 0.5-0.6 width
• ASA/ABS/PC (temps of the MCUs and bottom of the printer can reach over 50C)
• 3-4 walls
• >25% infil
• 1 mm top and bottom

Instructions (for installing the M5P onto this mount only):

•  Turn off and unplug your printer!!!
• The “UP” arrow on the mount points up when the K1 Max is lying on its back.
• Remove all of the connectors from the stock board
• Use the soldering iron to install the 4 M3x5.7 heat inserts into the bigger holes for mounting the board to the mount.
• Unscrew the stock board from the K1 Max, keep the screws for the next step.
• Screw on the mount to the bottom of the K1 Max using the screws from the previous step.
• Screw on the M5P to the mount using an M3x8 SHCS in 2 corners diagonally from eachother to just hold the board in place while you plug everything in. 
• Plug in  all of the connectors. 
• remove the 2 ea. M3x8 SHCS
• Install 4 ea. M3x35 SHCS to the through the M5P board fan mount, and rs232 holders, into the inserts and tighten.
• Connect to and configure the M5P. 

I will revise this model as needed, please send recommendations in the comments. Thanks!