Just picked up a manual box for my auto>manual conversion and was wondering if there is any way to check it before I put it on the car. Gave the guy 50 quid for it and will give him another 50 if it's a good box but don't want to put it on if I can check it 1st. There is maybe 2mm of play on the input shaft (in and out) but none at all side to side, is this ok? Also the oil seals look visually ok, what else can I do to check it?