I bought this ball head for the "Manfrotto tripod 055XPROB Pro" and a Nikon D5100. I own 3 Oblektive. The most serious is a Tamron 70-300mm. That was also the reason why I have decided for the larger ball head (see. K-30X. K-20X). I have the K-40X now for about 4 months of use. It works flawlessly. If the ball "fixed" was, no matter what position, nothing wobbles !! Very good!
Small info: I have for the K-40X in combination with the Manfrotto tripod (see above) bought Stativtasche: "Manfrotto tripod bag without padding 80CM". Both just fits so pure yet. So nothing can wobble in the pocket.
I would recommend the tripod head without restrictions!