There are quite a few placeholder models, they simply don't the have proper artwork created for them yet: Flak Cannon - uses the existing AA Tower model Gunship - same placeholder model it's had since the first alpha build Combat Fabricators - use the same model as the non-combat versions Vanguard - uses the existing Sheller model Defense Satellite - uses the existing Adv. Radar Satellite model. Orbital Fabricator Bot - uses the existing Adv. Fabrication Aircraft model.
If the gunship model is the one that's been there since Alpha, maybe we need to donate some placeholder models to Uber.
They're using placeholders for lots of units at the moment. The units (mostly) still function fine though.