Let’s just say it with its rightful owner. The thread is here & I was extremely happy that day 😁
https://www.retrobike.co.uk/threads/tt-legends-bike-re-born.353266/
In the 80’s it was very simple as everything was 144 BCD from all the Campag chainsets I had which were record, super record, gran sport, Corsa record, & the Pista versions..