Grace-Notes Under Pressure is an alternative to hardcore gridding as a means of getting comfortable with different grace-note and diddle combinations. It's a basic 7/4 pattern with a systematic walkthrough of flam and drag combinations. The juxtaposition of flam-paradiddle variations with flam-accent variations should challenge you to stay loose and relaxed as you add the "ornaments" (grace-notes and diddles) with variable amounts of fulcrum pressure.