.... Looks prettier with the distributor ..... in place!........
My first BSA was a 1961 C15S. I rode that thing everywhere.
Hoping to recall old memories viewing the complete bike, I went to have a look at the dropbox file but all I got was 2 of what seemed like Chinese characters. Oh well. Maybe try Postimage? It works really well here.
Oh, another thing. You could machine up a tach dive to go where your distributor goes since you don't use it now, and then you would have a C15 with a tach! That's exactly what I did on my 1965 C15FSR side points bike. That year had a threaded cap where the distributor used to go. I'm sure folks noticed but nobody EVER said anything. (It was rather easy project to do on a lathe.)