It was windy today:
so I didn't feel I was missing out on any flying :o) I went and fixed a few loose electrical connections in the van, then looked at the sliding door central locking. After a lot of investigation, I figured out that when you actually open the door, it moves the lock actuator, so when you then try to lock the door, it doesn't know where it is. This is an artifact of how I connected the actuator, so I spent ages trying to get that to work, until I broke the steel rod that does all the work. Luckily I have some welding rod, so I made a new rod out of that, and it seems to have fixed the problem.
I cut the grass in the wind, and called it a day.