Custom Built 3D Printer (400mm x 400mm x 380mm Build Volume)

This build uses, besides all parts included here:

4x NEMA17 Motors
12x 600mm 2020 Aluminum Extrusion
6x 600mm Smooth 8mm Rods
2x 400mm 8mm Lead Screw
12 Smooth Pulleys for GT2 Belt
2x GT2 Toothed Pulleys for NEMA17
~6m GT2 Belt
2x NEMA17 to Lead Screw Flexible Coupling
J-Head Hot End
Inductive Proximity Sensor
Arduino MEGA 2560, RAMPS 1.4, Stepper Motor Drivers, LCD12864
5x 24" Aluminum T-Bar
8x LM8UU Bearings
2x Brass Lead Screw Nuts
3x Endstop Limit Switches