Why is this a sticky? Because some of us wanted it to be a sticky, because it's nicely done, and because it's a very helpful hint that is easily overlooked, when accuracy is failing for no discernable reason.
Why is this a sticky. The front page is getting pretty cluttered. As of today 13 of 25 threads on the front page are stickies.
MY HW97 had loose screws yesterday. Accuracy was not the same until I checked my screws. I'll check more often.