Brush Knee, and Twist Step, through the Eight Gates; a passage to knowledge

For any student of Tai Chi Chuan there is a great deal to be learned from the practice of 'Brush Knee', (for the sake of ease I will use the shortened term) especially when that practice is repeated. It is for this reason Gloria and I often have our classes practice Brush Knee in one direction, and then Repulse the Monkey in the other, a great opportunity for exploring some of the mechanics of Tai Chi Chuan.

Gloria performs Brush Knee circa 2004

Photo's are time machines! Yours Truly circa 1995.

When added to the 'Eight Gates' you have a simple, repeatable form, which trains changes of direction and turning steps, alongside the basic Brush Knee, emphasising clear weight shifts, and weight free side steps, with twisting of the rear foot. 
'Brush Knee through the Eight Gates' provides a thorough training ground for the basic step-work of Tai Chi Chuan, as each change of direction gives you the chance to practice  key principles of stepping.
I will put up some videos Here; and the diagrams can be found here.