The parts breakdown shows both ends being keyed, but the manual is for the early models of the snowblower. Mine is a later model, there is a couple of minor differences. Main one being that the end I'm pulling on only has bolt through it, no key. And it probably shouldn't be a bolt, I think a shear bolt might be a better idea. Actually, there is four shear bolt locations on this thing, and not a single one in use.
I caught myself considering unbolting the gearbox on the backside of the auger and prying there. That is when I decided to bolt everything back together. I will break out the extension bit tomorrow and go from the top to drill holes in eachpaddle to hold down the rubber belting. In the spring I will talk to my local small engine repair dude, Jim Bergstrom. He used to be a Bolens dealer, and his dad was before he was. This blower has a Bergstrom Tractor and Implement dealer tag on it, even. I will pick his brain and see if he remembers. Meanwhile, I will run it without the shear pin in it, to see if the 2nd stage auger will break loose from the shaft.