For 50g Parts: 

Filament material: PLA
Layer Height: 0.3mm
Perimeters/Solid layers top and bottom: 3
30% Grid Infill
Rafts:No
Supports:No

For 3g Parts: 
Filament material: LW-PLA
Layer Height: 0.2mm
Perimeters: 2
Solid layers top: 2
Solid layers bottom: 1
5% Grid Infill
Rafts:No
Supports:No