MY front lever (most progressions) suck! I perform them on the rings, and can barely do the flat tuck. However, when I do the front lever on a pull up bar, i'm actually capable of doing it, and decently too. I recently just got a full back lever on the rings, yet can only hold it for about 3-6 secs. So should I keep performing the front lever on the pull up bar until I get better, THAN switch to doing it on the rings, or just try to keep at it on the rings and HOPE I do better?
Daniel