I skipped two practice this weekend, but I suspect that at least one of them would have been a little odd because of the shimpan seminar, which might have been somewhat interesting, though. I have been trying to do suburi and hindu squats. The latter are charmingly fun, though I can only do 30s with comfort. That I got a callus from my Saturday set was probably due to my doubling my set-sizes (to get through them faster), and bad tenouchi, plus an unfriendly bokuto.