OMG WITH THIS TECH, u could spend more time on more pixels, and a more complicated picture, or maybe i could learn how to do the scripting... you could create a TV SCREEN
i dont know about this one, but i you have problems using tank treads and rope, us these 2 tips:
select all the hinges in tank track and make them inf+ strength motors, at -0rpm
also make the chains have a larg density - these should help