Hi, do I need to replace all 4?. Found this place
http://www.sgs-engineering.com/gsc2430- ... roof-strut" onclick="window.open(this.href);return false; selling singles for £28.00.
If I just replaced these two, would that do it (only got a slight prop-up situation - if the wind doesnt blow it will stay up without the props

)
Cheers