Hi Ralph,
Your photos of the Primo canopy reminds me of similar water pools we have collected when using a Primo on our Troll 540 .
We have a 425cm version of the Primo, which goes the full length of the van, and some, and in bad weather end up tying one end to the back rail of the van and drop the poles or angle them (we have 3 poles). All a bit Heath Robinsonish, but it works and by doing this have managed to cope with the worst of weather up in Scotland. I'll post a few photos when we next use it.

Hi Randa, have you seen this ? It’s a similar product from Outwell. The do 3 sizes, M, L, & XL. They fit van rail heights from 180mm-210mm and 265 in length. I will try and insert a photo here…

Robbie