I can't believe I haven't even looked at this until now. Bloody good job! This will come in handy for consulting before I upgrade my analog front end later this year. Do you have any idea if anything like this exists for tonearms as well?
As an aside, I noticed the photo of the Dynavector Karat 17D2 packaging. There was a thread started by b50 about no longer running into RIAA frequency response graphs for cartridges at purchase. When I bought my 17D2 there was a graph showing the response of the actual cartridge I had purchased, not just some generic graph showing what is expected of the product line as a whole. There in the photo was the graph right in the box waiting for the lucky purchaser. It's too bad this is a practice used only for the highest end cartridges these days. (or so I read in the thread) I won't see one until I get my new gear at the end of this year. (if then!)
Music isn't an escape from life, it's one of the reasons to be alive in the first place!