Originally Posted by
LesterOfPuppets
He's talking about a little tube welded in between the chainstays. Here's a pic of my Pinarello's chainstay bridge

Thanks for that! the fog is begining to clear around the 'mystery of the unamed pinarello'. I see that you are a keen gardener, what are you growing down there? Potatoes? ;-).
Thanks for your help, it really is appreciated.