Yea, I could see how turning bones could be an issue when doing tricks and such. But depending on how the anim bp is set up, only tweaking the rotation in the snowboardy equivalent of “jogging” or “idle” states of a standard locomotion state machine might not be too bad. Alternatively, could also make a post-proccess control rig to adjust the feet and board using IK. This would likely be more time consuming than editing the source code, but it would also make the character more reactive to small bumps.