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@andyp
I haven't used tubs this season, but will next season for sure. You can run them at lower pressures to get more grip and eliminate pinch flats.
Gruppo is Campag Veloce which works fine bar the front mech, but that may be an adjustment problem. In a race a few weeks ago it would drop the chain everytime I changed down, which I needed to do on every lap, and I had to give up in the end and grind my way back up hill in the big ring. It was very muddy though.
Size wise the bike I have is probably a bit smaller than any of my others, but it has a sloping top tube so hard to give accurate info. The virtual top tube is 57.5 which is what I normally ride but I have a shorter stem and the bars are higher.