Lay the 288mm C-Channel from Steps 1&2 perpendicular to the first two channels, with the open side facing toward you, over the bottom set of holes with washers. Lay a 416mm C-Channel perpendicular to the first two channels, with the open side facing toward you, over the top set of holes with washers. Place a set of two washers over each of the indicated holes in Figure 2. Lay two of the 416mm C-Channels down parallel to each other, with the open sides facing downward. Attach the assemblies from Step 1 to the right and left ends of the 288mm C-Channel with the axle hubs and screw heads facing outward. The screw heads should be inside the inside C-Channel. Attach a drilled/tapped 4-hole angle bar to the axle hub using the drilled holes. The screw heads should be toward the inside of the inner C-Channel, with the the hub flange in the large hole. Screw together an inner C-Channel, an axle hub, and a drilled/tapped 4-hole angle bar using long TETRIX screws. Angle Bars (Use the 4-hole ones that you drilled holes into). Long Socket Head Screws (1/2” long 6-32). Short Socket Head Screws (5/16” long 6-32). GT2 20-tooth pulley with 2m of timing belt ( pack). Heating wire (12V), Thermistor, Heating block, 0.4mm nozzle ( pack). SO, WHERE SHOULD YOU GET ALL OF THAT FROM? NEMA 17 stepper motors (57 oz and 40 oz). 
PTFE Teflon Bowden Tube for 1.75mm Filament.
Flat Round Spacers (Instead of Flat Building Plates - less manufacturing, but more expensive).
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