Shock horror, Spring has sprung before!
Chatting to James Carruthers on the weekend revealed that he too has experienced a busted spring and knows of at least one other who has had similar misfortune. It's not that surprising really as this top spring must take a lot of the forces exerted on the whole assembly. Seems I can't link to the photo properly, Blogger let's me see it when composing but not once published so you'll have to go see for yourself here http://www.pbase.com/jcarruthers/image/7853836