I'm looking at two tripods, the 3001BN and the 3001BD. The main difference b/w the two I see is the flip locks vs wing nuts. Is it that much more convenient? Enough to warrant $30 extra? I know I'm already spending a lot of money but I'm still trying to be economical with my quality equipment Edit: And I really apologize for putting up yet another tripod thread, I just couldn't find a specific enough answer for my question.