Restore, if you cut the frame, how much do you take out, and how much do you have to lift the frame with the cut made?

That's what I was thinking Bob, maybe a bolt on the backside for easy access next time! : ) I'll inspect my unit when I'm out there next. Sure would be easier than messing around underneath. I'd only do this though if I needed to replace the sprocket before winter. I'm anticipating no more than 50 hours with it on the floppy sprocket before I pull the track frames anyway - would that be enough to damage the shaft splines? I'm assuming the sprocket hub is softer than the shaft.
Now, who has a worn-out sprocket with good splines?