I use the Solar undercover brolly system, and really like it for 24/48 hour sessions. For anything longer (which is rare for me) I'd like a little more space. Unfortunately Solar don't do an extension/porch for it.... I wondered if by pure chance the fox brolly extension would fit - it would need to use exactly the same spec' zip, so a long shot for sure - anyone tried it?

Failing that any experience of 'universal' extensions?