I conI used a cable management tube and wanted a better mounting solution for the bed. I took the design of @BGDog on thingiverse.com and did my mounting solution based on the measurements from @DJ_Designs. 

Printing: 

needs custom supports, 20% infill, PLA, no brim, 0.2 height

See the Cura screenshot for the placement of the custom support.

Mounting:

Use M4x12 bolt and nut to secure it in place