I got a Tengyun M, and hated it out of the box, It was dry, and not smooth like I expected it to be. I lubed the springs with weight 6, and tracks with silk, dnm, and weight 6. It did not feel good or smooth like my WRM, so I did what I shouldn't have: lubed the face of the pieces. I used silk and dnm, and it was even worse. I had a pop, so I tightened it. It was bad, and I thought I had wasted my money. So I cleaned it out and lubed it with just silk, and its great. It Is fast, but also stable. the turns are very effortless, so I used to overshoot. HOwever, I turned with less effort, and the tengyun was perfect. I added some weight 3 later, and it turned even better. I can actually turn faster on this, and rarely had lockups. I also got a pb of 12.09(pll skip). The cube was not the cause of this though, but I did get many sub 16 ao5s and. Guess I'm maining it.