Did a quick search and didn't see much so I thought I should ask... Are the Benro ballheads worth having? I have a cheapo piece of junk Amvona ball head that is just frustrating me to no end. I'm thinking of the KB-1 or KB-2 Benro head for the weight handling. I'll probably never have that much weight on the thing, but over built will probably last me a very long time. Heaviest will probably be my Mamiya 645 with prism, motordrive (6AA cells) and 500 f5.6 lens.