DUDE
Tell me more about that ballhead. Can you compare its stability to an Anvil? Compare how well it works for spotting, to a traditional ballhead? Is it as awesome as the idea sounds?
I've yet to have the opportunity to compare it to an Anvil. I haven't seen any Anvils here in Tucson, and I stopped shooting PRS matches shortly after acquiring this ballhead. I would love to compare the two, but haven't had the opportunity yet.
How it works is that you level the outer ball, and lock it in. The inner ball only moves in the X and Y axis (horizontal and vertical), so as long as you level the outer ball, no cant is introduced. It works as advertised. You can also leave the outer ball unlocked and use it as a "regular" ballhead as well.
The ballhead is pretty stout - it's designed for large cameras, and I bet it's every bit as stout as an Anvil. No issues supporting my 23+ lb rifles. Not sure if the gimbal is useful for PRS type work where you are constrained by a clock and cant isn't really an issue (large targets that are relatively close), but it seems pretty slick for field work.
Its going hunting with me this year, looking forward to that. I bet it's the ticket for glassing, varmint & predator shooting, hunting, or any type of field shooting. Would also work awesome for movers, you just need to dedicate the extra ~5-10 seconds to level and lock the outer ballhead.
If you don't like cant, this is a great system. It's very versatile and stabile. I've paired it with an RRS SC-LR, so that it clamp onto ARCA and picatinney. The OEM clamp uses a knob, which IMO isn't the best for tension and recoil - I much prefer lever clamps. The issue with mounting the RRS clamp to this ballhead is that they are slightly different patterns, so I've used some JB-Weld to create a permanent mount.