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.