I've had a CS Strat pro for about a year now. It's got the LSR roller nut and staggered locking tuners. I've been playing this guitar a lot, with extremely heavy trem use and have had incredible tuning stability until recently. My A string is binding badly at the nut now, mainly when I pull up (my trem is floating) it stays way sharp. I'm not sure what kind of maintenance these LSR nuts require but something is definitely up. I've been using the same gauge of strings (12-52) the whole time I've owned the guitar, my setup has not changed at all. Any advice on how to fix the binding or toubleshoot this nut would be great. Thanks!