Does anyone use this set up ??

For reasons only my missus knows, I own the extension for a Fox ultra 60 brolly system.

My shelter of choice however, is the Avid HD dual layer brolly system. It's perfect for when I fish the river/lake and the car is close by, but lacks space for all my gear when I have to barrow. The Ultra in now down to £280 and with the extension, would give me more space than just the Avid.

Would the Ultra be worth a punt so I can utilise the extension, or do I sell it ??