This design is complemented by: •3 metal slotted screws (4mm*30mm); •3 metal nuts (4mm); •3 metal washers (4mm); MY print specs: •Ender 3 with BQ black PLA; •Layer height: 0,2mm; •Support and support helper with 100% (it's not needed); •The other prints with 30% infill and 5 layers of thickness.