The Moving Accent Single Flammed Mill combines the Single Flammed Mill pattern (lRRLR rLLRL) with moving accents. In each bar, the accent shifts one position forward while the flam remains in place at the beginning of each four-note grouping.
The sticking pattern stays the same, but the accent moves one note forward in each bar. This makes for an exercise that challenges your control over flams, accents, and the mill pattern simultaneously.
Start at around 40 BPM and increase tempo only when you can maintain clean flams and clear accents throughout the pattern. Focus on precision rather than speed.