I bought this unit a few months ago and I am getting it ready for winter. Overall the unit is in great shape and seems to be working well, but I did find one issue. The the one-hand interlock on this unit is not working. I have looked at the set-up and the adjustment procedure in the service manual, but I can't figure out how this thing is supposed to work. I think there may be a bracket missing form my unit on the auger drive side. Does anyone have any photos of this system showing all the parts and how they work together?