DIY 3D-Printer (Large format)

Click the video below to start the playlist containing this project:

Link to printed parts, Thingiverse: http://www.thingiverse.com/thing:718271

Parts List:
5x NEMA17 Stepper motor 0.4 Nm 1.7A   --- $67.5 Aliexpress
Arduino Mega 2560 or compatible --- $10 Aliexpress
10x 6mm GT2 belt pulley 20 teeth 8mm bore --- $17 Aliexpress
2x 6mm GT2 belt pulley 20 teeth 5mm bore + 2m belt --- $5.48 Aliexpress
3x 6mm GT2 belt pulley 20 teeth 5mm bore --- $6 Aliexpress
20x Linear Bearings 8mm --- $10 Aliexpress
10x Hard coated linear rods 8mm x 500mm --- $71 Aliexpress
10x 608 Bearings (O=22mm I=8mm W=7mm) --- $4.25 Aliexpress, Get better ones ;)
2x M12x500mm Threaded rods (All Thread), or alternative --- $5 Hardware store
2x M12 Nuts "for extending All thread" --- $4 Hardware store
10 meters 6mm GT2 belt --- $10 Aliexpress
10x 100k high temp NTC thermistors --- $4.5 Aliexpress
RAMPS 1.4+ Stepper drivers --- $20 Aliexpress
5x End stops on PCB --- $5.7 Aliexpress
Graphical LCD / control for RAMPS --- $12.5 Aliexpress
Nozzle 0.4mm --- $3 eBay
2x Pneumatic quick release fittings 4mm OD (1/8" or 5mm thread) --- $2 eBay
Braided cable sleeving 18mm flat --- $16 eBay
2x 25x10mm fan ---$2 eBay
Cartridge heater 6x20mm 12v 40w --- $1.5 eBay
2m PTFE tubing ID=2mm OD=4mm --- $3.25 eBay
4x 158 teeth closed loop 6mm GT2 belts --- $4 eBay
4m PTFE tubing ID=0.3mm OD=0.6mm (20 cm needed) --- $3 eBay
5x 60x80cm 18mm plywood --- $100 Hardware store
40x20cm 12mm plywood --- $4 Hardware store
8x M6x70 Bolts --- $3 Hardware store / Car parts
16x M6x90 Bolts --- $5 Hardware store / Car parts
12x M6x50 Bolts --- $2 Hardware store / Car parts
38x M4x30 Bolts or Allen screws --- $4 Hardware store / Car parts
8x M4x40 Bolts or Allen screws --- $1 Hardware store / Car parts
4x M4x20 Bolts or Allen screws --- $1 Hardware store / Car parts
M4 Nuts --- $5 Hardware store / Car parts
M6 Nuts --- $5 Hardware store / Car parts
20x M3x20 Bolts or Allen screws (Some may have to be longer) --- $3 Hardware store / Car parts
25x M4x5mm set screws --- $1 Hardware store / Car parts
3D Printer filament ColorFabb XT (Doesn't HAVE to be this) --- $43 ColorFabb
Spring OD=8mm T=0.9mm L=300mm --- $5 Hardware store / Car parts
Aluminium for extruder and brackets --- $3 Scrap Yard

TOTAL: $473

+Parts for extruder (filament driving part)