I guess it was bound to happen. I'm a relatively new stringer (about a year, I guess) and thus far have avoided any big mistakes. In fact, I haven't even had a misweave yet. The worst that has happened was getting a slightly softer SBS than desired due to not checking my flying clamps enough during stringing. Well that has all changed. One morning a couple weeks ago I got up, put on some coffee and went about stringing one of my frames. I was finishing up my mains, and noticed there was something funny about the tie-off holes. I checked my other racquet and it was somehow different but I couldn't quite figure out what it was. The tie-off hole wasn't where it was supposed to be. Did I string too many mains? Nope. Then I noticed I had mounted the racquet wrong--the top was one set of grommets off center. D'oh! Of course, I was stringing gut. Double d'oh!! Well at least I hadn't tied off the second main. So I undid the whole thing and strung 'er up again, knowing I was abusing the gut pretty good by stringing it twice. That was 3 weeks ago, and the job turned out just fine--in fact it lasted longer than usual! Two lessons to be learned: always pay attention to every detail, and never string first thing in the morning (especially saturday morning!).