I feel that the strength of this forum is it's sharp focus on Commandos, with room for contributions regarding other Norton models and other marques. Many of the other Norton models share engine, gearbox, primary drive and running gear to a large extent, so I feel that there is a case to be made for keeping these models together in the Other Norton section.
There are many other forums for British bikes and none of them have the focus, quantity of traffic (regarding Nortons) or the generally high quality of contributor that we enjoy here. This is what keeps me coming back time and again. Someone pointed out in an earlier thread that there is necessarily a finite number of people interested in Commandos and this is unlikely to grow at any appreciable rate, in fact it may even shrink! As someone running any site the success is often measured in hits, but I believe that a dichotomy exists between 'numbers' and 'quality' and I'm not sure where the balance is. In general I feel that the more sub-sections there are the more untidy and complex the site looks and takes longer to navigate. If there is a real demand for any dedicated section then give it a go, but monitor the traffic and be prepared to drop a page and place the content back intoa general section if there is insufficient traffic. I note there is now a P11 page and there has been a long thread ongoing about P11s on the Other Norton section, but I personally doubt there is sufficient interest to sustain a dedicated P11page. You might consider changing this to a Hybrid page to incorporate all the other varieties including the G15 /N15s, but I'm not convinved that this will have significant traffic and I say this as someone who owns a G15 and therefore has an interest in this.