I have a 2013 Tremonti SE that I had setup from Sweetwater.com. I had the nut changed to tusq and setup with 11's. So, today I did a string change and was going to set it up to leave in drop D, half down. Once I did, the only issue I have had is the D (C#) string (not the dropped D), is returning back very sharp EVERY time I use the Trem. Every string is intonated well. I have even tried returning the guitar to standard tuning, and still the same issue with the D string. I've used Big Bends, stretched the strings properly, my action is 4/64 on both bass/treble and my under string radius guide is matched up perfectly for a 10" board. I plan to get some machine oil tomorrow and try the suggestion from the website of a touch of oil on the scews, as I didn't have any today. If I have no luck with that, what's next?? Please help, love the guitar especially with the USA tremonti pups installed today--but wanna use the bar!!!