these two 3d models are for the neca predator figures. they are based on xenomorphs heads outfitted with a plasma caster and a whrist blade.

both models are at the correct scale and only have to be prepared to print, its importend to keep in mind these weapons wil only fit on predators with no gauntlets, you might have to open they're hands so they can hold them.

if you have any questions or find anything wrong then send me a message.

as for settings i believe almost anything will work.