Hi steiner,
I own a Kaidan Twin Axis Bracket/Panohead and it is a quality product. It is also very heavy. I also went for the Stainless Steel Rotator. I have not ever had my hands on the MrotatorBP but can tell you the MrotatorA and MrotatorQ I have in my possession are both of high quality also.
It a decision you will need to make yourself, but with the confidence that both are quality products.
I hope this helps somewhat!
Regards, Smooth
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