Testing session. Had a bit of trouble with spinouts on this board lately and couldn't figure out what the problem was. Luckily Gerlof quickly discovered the problem: mast foot was way too far in the back (default Starboard setting). Many thanks for the help!
After that was finally sorted, my harness line's plastic cover over the actual rope broke, so I decided to swap to my replacement line that I always have on me. However, after the first gybe that one actually broke completely. So changed it back. It felt like I spent more time on the sand bar than actually surfing.
The rest of the day was better: some nice cruising in moderate winds and even the weather was cooperating!