Cut N Shoot, the questions you're asking are on the money, and leading to some very good discussions (good to see you here, this side up
); so please remember to put your topic in the header so others can search on your threads later on.
I think you hit on very important point in your last reply, and that is to scrutinize whether any plan set you happen to be looking at is the polished result of much blood sweat and tears; a design that has a yard full of prototypes behind it, or is just some CAD wrangler's best shot at what he thinks ought to work best? A good hull design won't need any appendages to help it along. If it's a good design, it can do the job all by its sweet little uncluttered self.