I have a couple of gibsons from around '06 (fadeds) and it looks like the posts on them are narrower than on a couple of '13 gibsons I have (SG std, LP tribute). Is that the case? If so when did the change take place and are both bridges still referred to as nashville bridges? I need to replace the bridge on an '06's and I'm not sure that just getting a "nashville" bridge will work. But I haven't run across anything that actually documents any change or how to specify one vs. the other.