"God is good all the time, and ALL the time, God is good!..." lol. Well, here's the thing: I'm pretty much "fluent" in everything else on the keys, BUT when it comes to havin' "speedy" fingers w/my left hand, I'm "sort of okay," if you feel me.
I don't know many speed drills besides basic scaling, and the VERY FREQUENT praise run workout from worship service, lol... Feel free to "ENLIGHTEN"..