Whilst addressing the problem of the azimuth attachment bolt coming loose, I've also decided that I need some form of damping in higher winds.

Fortunately, I've got a range of the hydraulic lift arms which I bought in the earlier experiments. Once the weather improves, I'm going to attach a couple of 10KG force lift arms to both axes of the solar array and see if that helps reduc rattling in high winds. I think that it was the rattling that managed to loosen the attachment bolt, so some damping should help.

I'll update once I've tried it ouit