winglit - from what I read I note you are running a line station, that presupposes there is a base station somewhere. Why not let them take the chances on costing and procuring ground equipment ? It may be that they might even have access to some approved maintenance publications on which to make a qualified assesment. Cost is not necessarily the first consideration here, safety might be. AMM 07-11-03 clearly states not to change the centre wheels without the use of two jacks, fore and aft of the beam. The correct weight rating will be stated in the ground equipment manual, also likely to be held by your base station. Find the manual, read, inwardly digest then, and only then, are you qualified to make the call. Don't take the risk, keep safe. You can be as sarcastic as you like, I have the option of hitting the delete button if need be . . . . . Terry