Note: top part is designed to have an M3 brass insert in the middle.
Instruction:
1. join "inner" and "outer" rings (it should be snug)
2. put all the rings on the "middle" part
3. put "top" part in the end of the "middle" part to close rings
4. insert the "lock" trough inside till you reach the "top"
5. crew it with M3 bolt
done :)
The author marked this model as their own original creation.