Optimized for FDM or resin printing by thickening the thinner parts of the skull for a lesser chance of breakage or failure. Also added more detailing to the teeth and gums. For FDM print with 10% infill and tree supports. Does not need a raft or skirt. For resin printing I suggest printing the main skull hollow with a 3mm wall thickness. Add a 10mm hole at the skull base where the spine would connect. Check the photos I uploaded if you're not sure where to add the hole. Print Settings Printer: K1 Max Rafts: No Supports: Yes Infill: 10%