hey guys, so i've been practicing scratching for a few months now... i got my babies, chirps, tears and flares down pretty good now... i can do combos ... here's my question.. when i practice at say 90 bpm... for a few days.. i move to a diff track thats about 120 bpm or higher.. and i try to do the same combo... for some reason it doesn't sound right.. or it just doesn't go with the flow..and i cant get it to be on time.... kinda hard to explain.. but for those of u who know what i'm talking about.. please help me.