Was having issues using my RepRack above my printers with 3kg Spools so I made my own solution!  This works amazing and lets me print right from a rack mounted spool holder above the printers. Optionally add non-skid feet for a standalone desktop option.

What you need:

• M8 Rod (Threaded or Smooth) (Cut down to 148mm)
• 8x M3x14mm screws
• 8x M3 Heated Inserts
• 2x skate board ball bearing 608ZZ