Yes, it's a model I downloaded from sketchfab, iirc. Was for free with standard CC attributions. Did a few things to cut the vertices down. Engines and weapons are separated objects from the main body and tbh, not terribly concerned about the weapons anyway.
5k verts, 8.4k edges, 3.4k faces. not sure how much all that makes a difference or if that's high. And yes, been using blender to make a few small tweaks. https://gyazo.com/ec11d2cd92bcf8a1110ab46d1f667daa