o.k been playing ever day now for about 3 months ( catalina jazz kit with hi hats and a pig ride only) I've gotten used to just hi hats and ride...a friend left his kit over here, with an assortment of crash cymbals, my timing hitting crash cymbals is off, I've never used them, mostly because of noise/neighbor thing. what's some good exercises to incorporate crashing into my practice routine ? thanks