Not sure exactly what possessed me to jump into another chainsaw as my next project but I figured it was time to finally go through the Mono-Line. I got it all disassembled today. The gearbox is set up differently than most of the Orline saws. The chain sprocket is to the outside. Unfortunately a previous owner cut the crankshaft flywheel nut and ground it and the end of the shaft flat. A few of the threads are broken off too. It’s bad enough, and seems overly brittle, I’ll need to replace it if I can hunt down a used one. The screw that holds the chain sprocket was also cut in half, makes no sense to me... I can’t figure out why either of these modifications were thought to be necessary, frustrating when people do stuff like that.