1927, Tourist Trophy. Carlo Guzzi writes to Angelo Parodi communicating “live” the changes to be made based on the problems that emerged during the race, such as the frame breaking. Guzzi demands two internal reinforcement tubes for the 250; he complains of a small cylindrical hole in the center of the valve flare not foreseen in the drawings: “this is done out of carelessness: please notify the plant manager of this, because it causes self-ignition”. Finally, the necessary reinforcement to the pivots of oscillation of the fork. A striking example of how important racing is; not only for prestige but above all for product development.