After installing new rings etc, I still don't feel like I have everything right, but decided to give it a run. About 1/2 in I went to pick up some branches leaving it running (no blade or drive engaged) and all of a sudden it made a racket (scary). I shut it down. The blade is now at an angle. I found it odd on assembley that the spring didn't seem to a guide. There were no leftover parts, didn't see anything in the manual.

