Greetings, I would like to address what I perceive as a misconception regarding this tailpiece discussed in online forums. It seems a lot of people perceive this tailpiece to be the same as the standard issue Zamak Tailpiece that ship's with most Gibsons, the only difference being that it is cast in aluminum rather than Zamak. I have recently retired from a lifetime of Tool and Die, machine shop employment. Careful examination plus measurements clearly show's that the Historic Spec casting is nothing like the Standard issue Zamak piece. There are many differences between the two, both in size, height and the actual profile's of the casting. That's just the tip of the iceberg. I understand that minutia is not of interest to everyone but trust me, there are many, many differences between the standard and Historic Spec tailpiece's, the main one being the Historic Spec being a lot more accurate to what they actually slapped on the guitars back then. It just seems to me anyway that most people do not even consider the changes and automatically say, Geez, I will by a Gotoh for much cheaper, I can't say which choice is more correct but it just seems like the Gibson is automatically getting a bum rap as being a "Rip-Off"