Well, when buying a used machine you discover a few issues right ! I have a 42inch deck which had 36in deck blades fitted. Discovered this when I broke a shear pin recently.... Anyway wanted to fit the new blades and the gearboxes are currently timed at 180 degs - so both blades would be inline. This was ok wth the old blades as they were smaller and did not overlap. So is there a way I can retime the gearbox so the blades are at 90 degs. I have the old deck that has the grease nipples on the tube connectors between the gearboxes. I think the machine is a late 80's model (not sure). Apprecitate the help !