Had to mod this baby a bit to accommodate my gigantic 5kg spool. The rollers have been widened a bit and the roller profile concavity rounded, and I made the two halves of the holder / frame press-fit instead of needing a screw. The fit is not perfect yet but has potential, I should really post it as a mod.
One cool thing about these is that I printed the first few layers with the silver filament left in the tube, so they have a great two-tone appearance with silver facing the outside.
Thanks @wavexx for a great thing!
Silver & Black
My Mods were made using Blender and printed on my beloved Tevo Tornado. =)