I've got a G5230t and the B50 Bigsby is a bit of a problem. Before I go replacing it with a B7 or B70 I am wondering if the tuning stability is good with them. The B50 is designed for a flat guitar and binds up a bit when the mounting screws are firm on my 5230. The B7 and B70 are designed for archtop guitars so should be better. Is that what people have found?