Filament: You can make the parts out of any type of filament you choose. There is no need to have a preference. But, for the bed feet, and the inserts used on the motor controller box, you should have a flexable filament like Ninjaflex or TPU. Carbon Fiber Tubes: https://www.kitesandfunthings.com/Products/Sky-Shark-P-Series-Tubes-Blems__SSPSERIESB.aspx Name: P-200 Qty: 2 Carbon Fiber Rod: https://www.kitesandfunthings.com/Products/MICRO-Solid-Carbon-Rods__CFMICRO.aspx Diamter: 0.24" OD (6.1mm) and 48" long Qty: 1 Screws 6 - 2mm x 10mm (used as set screws for the handle hub and gear) 8 - 2.5mm x 16mm (attach brackets and motor controller box) 9 - 3mm x 10mm (Attach uprights to bed and top plate, and 1 to connect the lower motor mount to the brace) 4 - 3mm x 30mm (Attach motor mounts to carriage) 6 - 3mm x 16mm (for carriage top stop) Nuts 8 - 2.5mm 12 - 3mm locknuts 2 - 3mm (for carriage top stop) Washers: 12 - 2.5mm 14 - 3mm 1 - Spring: Uncompressed length: 63 mm Inner diameter: 14 Wire diameter: 1.5 Or find something that works for you then make your own spring retainers to hold them in place A 'Big Bore' shock from you local hobby store will do the job. 2 - 3mm x 8mm x 4mm Bearings (used for the gear/handle axle) Motor: 380 size (27.7mm can, 16.2mm mounting hole spaceing) PWM motor controller (https://www.ebay.ca/sch/i.html?_from=R40&_trksid=p2380057.m570.l1313.TR0.TRC0.A0.H0.X4.5V%7E35V+5A%2F10A+Mini+PWM+DC+Motor+Speed+Regulation+Controller+.TRS2&_nkw=4.5V%7E35V+5A%2F10A+Mini+PWM+DC+Motor+Speed+Regulation+Controller+&_sacat=0) Mini-Collet (https://www.ebay.ca/sch/i.html?_from=R40&_trksid=p2380057.m570.l1313.TR0.TRC0.A0.H0.X0.5-3mm+Electric+Drill+Bit+Collet.TRS3&_nkw=0.5-3mm+Electric+Drill+Bit+Collet&_sacat=0) 16 or 18 gauge wire XT60 connector (or your choice) 30mm fan (https://www.ebay.ca/sch/i.html?_from=R40&_trksid=p2380057.m570.l1313.TR12.TRC2.A0.H0.X30mm+fan.TRS0&_nkw=30mm+fan&_sacat=0) 3mm hex shaft (for gear and handle) (https://www.ebay.ca/sch/i.html?_from=R40&_trksid=p2380057.m570.l1313.TR0.TRC0.A0.H0.X3mm+Diameter+Shaft+Set.TRS3&_nkw=3mm+Diameter+Shaft+Set&_sacat=0) 2mm brass rod