Bigsby B-5, 50, and 500s are good trems if you learn all the stabilizing routines to keep it sound like stretch strings, make ball end string rounded perfectly around shaft, (oil the nut, shaft, and saddle pieces), etc. Locking tuners don't hurt. Graphite nut is good as are roller bridges. You don't have to do everything but the more stability factors you add, the better the Bigsby treats you. It's a crummy trem if you don't take the time to set up and prep all string binding factors, but it's actually as stable as a Fender trem if you take the time to set it up.