Despite my carelessness. I am doing an engine swap and as part of it testing out the briggs stator that I rewound. So I removed the flywheel. I used some penetrating oil on shaft as part of removal. That went fine. At some point I noticed the pooled oil in the crank end. Figuring that would be an issue when bolt went back in I used rag to soak it up and also blew air gun into it. Meanwhile I had the flywheel on and off to test clearance of screws into shroud to hold regulator. At some point I looked at flywheel magnet side and saw that one magnet had picked up a stray lock washer. So lucky to catch that. Then at some point I looked into crank end. No oil to be seen but something caught my eye. The flywheel key. I knew that it wasn't on the crank or flywheel but assumed laying around on floor somewhere and was going just get a new one. Lucky to catch that. Then I mounted regulator to shroud with sheet metal screws. After shroud was on I turned by hand and heard the scraping. Removed shroud and cut end of screw off with dremel. Lucky to catch that although the hand test turn was planned)
Lastly I had to change starter gear. It's the cross pin style with a black plastic piece. In past I found it tricky holding shaft on vice to drive out pin with breaking the plastic. So I mounted starter mount flange in vice to drive out pin but in replacing pin I actually had the mounting flange crack in the vice. Lucky part I think is that right bolt hole is only 1/3 open so bolt still hold it in proper place and I added a washer to increase clamping area of the bolt on the flange.
So last thing of night I had put cord into cylinder and torqued flywheel to 70 ft lbs and would finish in morning after confirming torque was the 100. So I have a dream during the night that I had tried to start the engine with the cord still in the cylinder. Now that was just a dream or maybe nightmare.