IMHO the idea of 'mods' can easily span a very large area. To some, 'mods' is about tuning and getting the 'best' out of the engine. to others it is more concerned with the suspesion and brake set-up, whilst others will look more towards bodywork.
Each of these areas is covered with a forum of its own as well as model specific forums.
A quick look at the MGF and Electrical forums shows that these areas are already being well catered for.
However, if the general feeling of the membership is that we need a further forum for this, then I can see no reason why not.
There is a facility for such a Forum - at the moment there isn't a requirement for such a sub Forum.
I agree with John's sentiments that we should be out in the open - maybe when we have a many more subscibers. Also, the Forum is self regulating - I doubt whether a moderator has done anything to date, because of the adult postings we recieve.