Love the idea of using the ball (or block) below the sacrum + heel beats with a settled ribcage to open the fronts of the hips. Curious to know how it's successful in helping to open the front hips! Does keeping the ribcage settled + sacrum stable whilst moving the legs at the bottom of ROM really ask the front hips to "relinquish" some grip because of positioning? Something else? Can't wait to get on some equipment to try it!