I'm looking to get another ballhead. Comparing the acratech, foba, arcaswiss B1. Just found another called Markins. Read the Markins M10 is very light weighing about 510 g and can carry loads of 40 kg. Very impressive specs. Look like the B1. Claim to be very well build and operates just as smooth. Any CSer have this? Want to share your experience. Thanks.