Well, it may be a good idea to test this, I'm finding the magic number to be more like 25,000 verts, There seems to be some discrepancy between what O2 will swallow and what buldozer and the game (A2 atleast) will display.
creating sharp edges in o2 increases the vertex count during binarization, or when the game reads the p3d . so what shows in o2 is not the final count unless all of your edges are smooth
Still in progress...haven't had a lot of time this week. Don't expect this to be released very soon. Once the first model is finished, I still need to figure out how to animate the rotors and controls, figure out attach points, multiple LOD's, ...probably a whole bunch more stuff I don't know how to do yet...
Even though this is my first modeling experience I refuse to let this project be low quality.