Right now I'm averaging around 20-23 seconds. I've been getting some sub-20 averages, but they're not consistent. My cross is around 4 seconds, the rest of my f2l is 8-10 seconds(f2l total is around 13 seconds), and my LL is around 7-8 seconds. I use full PLL and 2 look OLL. I've been cubing for around 7 or 8 months, and I feel like I'm not improving much... What part should I work on the most right now?