What is the best advice on building speed besides practice? I have been working on my single stroke roll. Right now i'm at 250 bpm and want to get faster. I am using promark forward 5b select balance sticks and a practice pad. Is it just practice or is time a factor? I bought the sound track to whiplash and have seen the movie and would like to be able to play that fast someday. That is my goal for this year.

Keep drumming
Gregg