I suspect there is a memory leak. Been playing this game all afternoon and evening, and suddenly Windows wasn't able to perform as it should. Everything was going so slow, even the task manager failed to show up the first minute after I pressed CTRL-ALT-DELETE. And of course the game crashed meanwhile, so I didn't get to see how much memory it actually used.

Oh, and one more thing. The lower wheels aren't connected to the suspension if you try a tank in test mode. Wheels aren't connected to anything in fact. Looks weird when they follow the ground, but the suspension is not doing anything.