Ha! Join the club. I just brought home a DeWalt circular saw from a garage sale. I was looking for a manual on line and there is a recall on it!!! I suspect that the guy who sold it to me really did not know as the whole thing was caked in what I take to be sheet rock dust. Some of it has formed a new rock formation of its own. So he must have been using it...
I was going to put a steel-cutting blade in it and have a go but I am having second thoughts.