I'm assembling a 57 Huntmaster from several boxes of bits. It is going very well so far but I have hit a snag. I've just fitted the front mudguard and tried to fit the front stand. I find that it is too short to pass under the mudguard and up into its bolting position. I've just checked the spares book and it seems there are two types of front stand, 4730-56 (56-58 models) and H47-46 (46-56 models). I suspect that mine might be the earlier one. Can anybody tell me what the measurements front to back are on these two, please?