
I built a homemade version of this and ended up crushing my feathers and bending everything out of shape. the thing works without problems. Actually I bought another style on ebay and ended up using both. This style worked well for the spring on the bottom of the body, but you'll need a different style for the entrance drum.

Xiaomi Mijia Ratchet Screwdriver 16 in 1 Screwdriver with Interchangeable Bits, 10 pcs, Black
22 Review

Bit and socket set Stels Tool set, 1/2", 1/4", CrV, plastic case 94 pcs, Stels, 94 pcs, black
46 Review

Rechargeable screwdriver OA-3,6F (433.0.2.00), 3.6 V, 1.3 Ah Li-ion, blister
46 Review

Xiaomi Mi x Mijia Wiha Precision Screwdriver Set (DZN4000CN), 25 pcs
34 Review