Did this a few days ago but forgot to post it. With me, it's not the calluses that are a problem, although now that I've only been playing twice per week, the only remaining one I have is a very thin one on my index finger of my fret hand. I'm sure it would be a problem here if I could play it more times in a row than I can, but my fingers on my other hand just don't have the stamina to keep up that pace beyond the first time. The first time I played it the other day, I kept up alright, but the second time I began to falter half way through. I would start falling behind, and I didn't fall far enough behind that I missed a note, but I was noticeably off. The next couple times were more of the same. Played it 4.5 times that day and that was about all I could take.