This is most likely a profile from Museo rag when it was still owned and coated by Crane and not Intelicoat. When Intelicoat took over things went down hill fast and we haven't seen a good roll since (without defects).
I'll see what I can do in the lab to get this profiled for our upcoming release of Piezography curves at piezography.com relaunch. (will post here first though).
It may be a K6 curve as that is what we have on a 3880 WN right now but it will work in your K7 printer just fine.