-No Support needed if you set your Layer height to less than Half the Nozzle width. For Example: on 0.4mm Nozzle, print at 0.15mm Z height or less, so your extuded plastic "doesn't fall off the cliff edge" - Print using ABS plastic for maximum lifespan and flexibility. This sample was printed using a 1mm nozzle in draft quality and yet works perfectly fine. - There are two versions included. One smooth for immediate printing with knife model shown, another version with raw edges for you to edit to suit your knife model.