Peter, why not just check the weight distribution? Shouldn't take any more than 5 minutes. All it takes is a set of bathroom scales, two similar diameter, fair-sized pieces of pipe 18" long, and a block of some kind the same height as the set of bathroom scales. Just a the pipe inside the sideplate, bridging from the front to the rear roller on each side of the mower, with the scales underneath the pipe on one side, and the space block proping up the other pipe to the same height so the weight is properly distributed. Read the scales, then switch the pipes, scales and prop to the other side. Read the scales again. If the scale readings are identical, balance is perfect. If not, we'd all like to know how much different they were. Then if you can get hold of the other two widths of machine and repeat the experiment, we'll end up knowing whether Scott Bonnar's engineer knew his onions or not. Be fair, though: the mowers all need to have the original engines.
