Actually if you look at the link I sent in the last message and really think about it, the 55' series is really an excuse for Gibson to put the 55' neck on guitars with finishes and/or pickups that came out after 1955'. The neck is one of the most comfortable I have ever played. Here is a comparison:
The routes are the same as standard humbucker routes so that part is exactly the same as the 57'. The Hot Mod is all in theory because my guitar was never actually a P90 guitar first. So it was made with the regular humbucker routing that the 57' has. There are actually quite a few different versions of the 55' series. For example, there is a Hot Mod Gold Top. There is also a version designed as a recreation of a 55' Goldtop that was then refinished as a burst. In otherwords, a 55' Goldtop that was refinished after 1958. Of course it's a recreation so it was never actually painted Gold first. The burst just didnt exist in 1955. It's a pretty cool series in my opinion. You can check them all out here by selecting the different models on the side: Gibson.com: Gibson 1955 Les Paul Custom Exclusives
Hi, yes it still has the all mahogany body. The Hot Mod is a re-creation of a 1955 as if someone back in the late 50's/60's took their 55 Black Beauty to the Gibson factory in 1957 or later to have the P90 shaped routing expanded for the PAFs. Many people did this after PAFs came out in 1957. The end effect for the black beauty in comparison to the 57 is that it has all the 57 reissue specs, but with a 55 neck. The 55 neck is as thick as a 57 neck, but with softer shoulders so it does not feel quite as fat. The 55 series (and this guitar) also have the tone pros long studs and anchors, which drill the bridge and tail piece deeper into the body for increased sustain. This is a notable difference from the regular reissues that Gibson makes, such as the 57'. Hope that answers your question.