@Topaz Fair warning...my 2nd shin smash of 3 so far was when I was learning to go downwind. I cranked a couple miles upwind having fun finally foiling the entire time, then realized it's time to head back to home base.
Long story short, one tack direction I was going downwind, but making zero ground down shore...weird ass feeling. I tried to defy my ability and just go hard core downwind. Not a good idea. Lost the board leeward and smashed the shin on the board.
Now, I play my downwind angle much more like a beginner should and I learned you have to alter your angle downwind according to what the wind and water are giving you. When you feel less pull from the harness I bar in and grab a few more degrees less downwind and then when the water and wind allow me to go more down wind I slowly test it out but cautiously.
The thing I like and appreciate about trying to head sharply downwind is that foiling becomes that much more intense, it's like one moment you are locked in hauling ass upwind, then all the sudden you are ice skating for the first time and the intensity is thru the roof.