A further crafty trick adopted by some modern tripods is that the legs swing absolutely upwards for stowage, with the feet encircling the head. This usually cuts about 20cm off the folded height. Answer: This ball head just isn't appropriate with arca swiss, it's ulanzi F38 quick release ball head. https://skateboarding66542.iyublog.com/21638731/indicators-on-primos-shooting-tripod-you-should-know