Required parts: 1 x 8 mm round aluminum tube. 1 x 10 x 12 mm rectangular aluminum tube. 1 x 0.25 mm nichrome wire. 12 x 8 mm round adhesive bumpers. 1 x 3mm round metal spike 4 x M3 x 8 mm flat screws. 6 x M3 x 14 mm countersunk screws. 1 x M3 x 10 mm flat screw. 2 x M3 nuts. 1 x M3 wing nut. 1 x M3 x 16 mm flat screw. 1 x M3 x 20 mm countersunk screw. 2 x M4 x 40 mm hexagonal screws. 1 x M3 x 5 mm grub screw. 5 x M4 nuts. 2 x M4 washers. 1 x M5 washer (15 mm outer diameter). 1 x M4 wing nut. 1 x female 12 mm 12 V socket. 12 V DC Motor Speed Controller. 12 V DC PSU (3 A). Superglue. Some medium gauge wire. Zip ties. Electrical terminals. This is the exact speed controller I used: https://www.amazon.es/dp/B07SJLT63W Also this is the tool I used to bend the aluminum tube: https://www.thingiverse.com/thing:1680823