I've contacted Basso in Italy and they were NOT AT ALL helpful, claiming this information was 'closed' and not available. My bike is a '86 (?) Basso Loto (Columbus slx tubing) 56. It has a 56.5 tt but I need the seat and head angle to help me order a new custom Independant Fabrication. Any idea where I can get gemetry chart for the old Basso?