Gear driven object plate for 3D scanner

It has four gears.
Gear A: T10
Gear B: T60 and T10
Gear C: T60 and T10
Gear D: T100

It makes the final gear ratio to 360:1. One rotation of Gear A makes one degree rotation of the object plate where an object seats and be taken shot by a DSLR camera.

Gear ration calculation:
T10 to T60 makes 6:1
T10 to T60 makes 6:1
T10 to T100 makes 10:1

Final gear ratio is to multiply the three gear ratios: 6 x 6 x 10 = 360.

Parts:

Hole diameter 3 mm and outer diameter 10 mm bearing x3
M3 washer x12
M3x10 bolt x1
M3x20 bolt x1
M3x30 bolt x2
M3x15 bolt x3
M3 nut x4
M3 nylon lock nut x1

Tools:

Hand drill/driver
2.5 mm drill bit
A set of metric Allen keys
5.5 mm wrench