Help me out here guys. I use a 20 year old Bogen / Manfroto tripod with a 3147 head. I have been seeing these weird L-plates wondering what they were all about when I saw this post. I looked at their wares and have to ask why people would pay 400 or 500 dollars for a ball head? Ball heads were junk when I bought my tripod. Have they gotten that much better to justify the price, or are the just trendy?