There's a big problem with the Xit404 twist clamps and that Zen tripod base because the ball adapters are pointing in generally the same direction that the legs usually would. This means that when you twist the leg, the clamp can just spin and not tighten because the ball's mount post is not in the way to stop it. You can even see that happen in the video twice (e.g. at 01:49). Just tried it on my Xit404 tripod with the legs pointing straight out in the same direction as the balls. They just spin and don't tighten. Traditional clamps are definitely the way to go with that base in my opinion.
One thing I do on my Xit404 base is actually pan the camera. It's not designed to do that but it works. I can rotate the whole housing around the central screw by pushing with my thumbs. I have a plastic sheet bonded to it (by a cobbler with shoe glue) to make it smoother. You can't do that if you use 2 screws, but it does look like you could use only one with the Zen base.
Also those Inon legs look like they might be floaty, especially if they're sealed and not designed to flood and drain. One thing I like about my Xit404 tripod is the weight. However the Inon legs look a bit longer, which is good. I very often yearn for a few more inches, even at Lembeh and Anilao, where you would imagine everything is low down. It's not, and the Xit404 legs are very often just a bit short. Oh and the Inon telescopic arms are $123.85 EACH.