You're going to need:
-1x all 3D printed parts
-3x GT2 idler pulleys 20 teeth (2x smooth, 1x with teeth)
-2x GT2 Timing pulley 40 teeth
-1x GT2 Timing belt 1000mm
-4x M3x12 (DIN ISO 4762) (Base to printer)
-2x M4x25 (DIN ISO 4762) (Idler to Base)
-1x M4x16 (DIN ISO 4762) (Idler to Tension rod)
-4x M4x20 (DIN ISO 4762) (Top to Base)

Only the Tension rod will need supports to print.