I just wanted to apologize in advance, in case I offended anyone. These bikes are rare, and I'd fully understand if someone, reading my first post, would be angry at me or something.
I did not sense that in all your answers, that were very helpful ! But for future readers maybe, so I wanted to leave a little disclaimer.
I wanted to say that I intend to respect the machine, and not butcher it. And that's also why I come here to seek guidance from you guys, to exchange on these wonderful bikes, but also before making stupid mistakes, thinking it would be good. I'm newborn in the BSA world, and I know the bare minimum... I'm clueless on lot of whys and wherefores.
So thank you for helping me !