i feel stupid...

don't sweat it bud...sometimes you just make it easy and if i see it first, i'm jumping on it. i see you edited your op too...good job

the cable spools on the tank retrievers (if they had one) only carried 150 - 200 feet of cable...chains were used more than cable for towing. they could if necessary, supply emergency fuel for a tank, and carry a small amount of ammunition. if this type of vehicle were to be put in the game, it would have to replace vehicle supplies for it to get used by more than curiosity seekers since it is so slow. even then, instead of instantaneous repair it would have to work like a field refueling pad...sit next to a broken down tank for at least 30 seconds.
it would still be a bit gamey but, for the sake of game play it would probably be acceptable...there would probably be whines about the loss of vehicle supplies for the existing gv's that can carry them.