I hate figuring out when to divide down to more subforums and when not to. It is the hardest part of running a successful forum. Most forums die because of doing them too soon or too late. Typically too soon. I really try to wait until a forum is buried in a page plus of posts every day and then if the broken out forums can yield a half page to full page a day then it is typically justified.
So far this seems to be going well and as the subforums continue to grow it will only get better for each one. The main monster truck forum allows everyone to discuss any MT. This you can use for generic questions, comparisons or even specific truck questions if you don't want to post in the specific subforum for some reason. Ultimately my gut tells me the timing is close to being right for this and things are going to get busier this year. Tell all your bashing and racing buddies about RCU because the more the merrier. The members make the site truly great since more people means more information shared. We have plenty of bandwidth and disk space to burn