Pirahna Alien heads

I recently started to learn to use Zbrush and this opened a lot of options for me. I decided my first freerun project should be something for wargaming and thus I created this set of heads. They are inspired by Warhammer Tau obviously but I wanted to give them my own curbes. They could be used with my Gue'Ron'Vesa kits to create a interesting mix of ideas and perhaps a new auxiliary aliens that are capable of adapting to the recovered/reverse engineered astartes technology?

They should be printed so that their height is 6-7 mm. My Prusa Slicer says it means the scale should be around 298 but it's best if you guys check it before you decide to print them in larger quantities.