There are holes in the bottom for weights (especially with three handles it can get front heavy). I would suggest no supports if your printer can handle it for this print (mind did fine) because cleaning the hole for the handle and blade will be annoying.
Category: Tool Holders & Boxes
The author remixed this model. Imported from Thingiverse.
I have one of the skinny sized handles and two of the larger sized x-acto knife handles so I remixed this thing to have one for the large handles and also one for two large handles and one skinny handle.