bought one off of ebay a while back, liked it , but never really practiced till recently.when I picked it back up , I noticed every time I would aggressively bend and vibrato, the G and B strings would go slightly flat and I would have to push on those strings above the Nut to put them back in tune.Thought it needed a new Nut , took it in to have one installed- problem still exists. Left it with the pro - he spent a few hours trouble shooting - never could figure out the problem.Last time I went in , we started pulling new ones off the shelf and everyone they had did the same thing.
This is why Todd ( and everyone )warns to try it before you buy it.
of course being left handed ,I don't have that option