I also have an donek razor as my hard-boot set up that i use for really digging trenches, but as for my set soft boot board (Unity Pride) i can hold an edge through the choppiest of chop.
Here's a thought i just had on stance when I'm doing squats in the gym i find it more comfortable to have a stance similar to how i ride (slightly wider than shoulders and ducked). But that is negating lateral movement / forward lean when riding, so i can imagine that the back knee is under some unnecessary torque when there is heavy forward lean and heal side. Then again im not at all trying to euro carve with those angles, the most i do is some knee drag and butt drag, toe side and heal side respectively.
I will have to look into a set of risers this year and start angling back.