Today while I was hitting Unicorn I thought about Snowolf's comments and realized that I wasn't shifting my weight back on heelside turns. I started paying close attention on a few turns and realized that my technique was significantly different for heelside and toeside, even allowing for the obvious asymmetric issues. So I worked a couple of turns making a point of shifting the weight as I came across the fall line, et voila! I could feel the board lock in like I'd just snapped a binding shut. Damn it's scary how subtle some things can be and still make a big difference.