Im having a major problem with getting my left hand speed going! My left hand cant keep up with my right hand! I have been complemented on my left hand technique by bassists who know what they are talking about but i havent got any speed! My speed is better on fretless but still not up to a standard where i can do some blazing licks. What could be the problem? How can i solve these problems? And what exersizes do you do to help with your speed?