Have had the same problem.
Left leg is a little longer and a little stronger than the right (I'm a freak

). Blasting with a big fin and sail, this means a little better speed, angle and stance on Starboard tack. On a wave type fin this means too much fin pressure and spinout, specially when I'm getting tired after a long session.
I'm no expert, but there might be more freaks like me out there...