layer height 0.2, Infil 10%

Chain: printed without supports with brim, speed may need to be slowed down if model is scaled down

Brain :printed with tree supports and skirt.

Model can be scaled down to 0.6 and the chain still works well off the bed.I printed both in same colors but do try different colors for chain

For assembly use glue if necessary , for my 0.6 scale model it was not needed.

I have provided step file of chain if anyone wants to incorporate it in other models