unstable

Hey! I just bought a fangshi shuangren v2 to replace my old Zhanchi. My only problem with the cube is that it turns way too fast. I mean it literally slips out of hand while solving. Take into consideration that i am strugling to get sub 30. I tried adjusting the tensions but it just doesnt...

I've been descending through the sub-20s for a about a month, but now I have a problem. Earlier this week, my avg of 12 was 14.9, but now it is very unstable (13-18). I think my main problem is debating whether to focus on look-ahead or turning speed, and how to get better at looking ahead. Any...