Elias Acrich wrote:
For the dayan gem VII I have it in orange body and all the square faces turn great, and for the hexagonal faces, its one of the smothest puzzle I have, so I don't know why the black ones turn bad.
After a few solves, the square faces on my black body DaYan Gem VII are a little tight, but they turn OK. The hexagonal faces turn nicely. I did lube the square faces (actually I lubed one and then scrambled the puzzle) and I adjusted the tension.