Roof bed lights …

[andyinluton]

This may help a little, unfortunately I could only get my hands on the first page; up to 20cm drop over 3 days is considered normal with no action to be taken. Interesting info on the auto correction feature which is slightly different to my previous understanding in that if the first check + 10hrs doesn’t identify some sagging then it isn’t checked again - as opposed to being checked every 10hrs regardless.
View attachment 85833

I would have accepted needing to manually retention the roof every evening as being within tolerance.

Similarly, if it was only a problem when it went from a scorching hot day to a freezing night, that to me would be an annoyance but understandable.

To find it sagged only on one side so much that the roof is twisting and the lights don't work in the morning, when the roof has only been up for 12 hours with only a few degrees change in temperature is unacceptable.