As far as I know he is waiting to get them back from being machined. When they come in, I'll be swapping over to his new mount. I like the design as it appears to be highly functional, and developed for his sling as opposed to a generic product.
We could sit and talk about why his sling is better all day, but the tubular webbing yields a substantially higher rating in durability, strength, and comfort. There have been some people who have been afraid of the thinner tubular webbing, but they are obviously people who have never used it. The design of the tubular webbing prevents it from folding, or creasing and digging in. The thicker material also allows it to distribute the weight better. Flat webbing bows under weight, so instead of having a 1.5" sling taking up the weight, it bends and you end up with 1/8th" digging into your neck and shoulder. Tubular webbing makes a massive difference.
The other high point for me is the centrsl connector. It redirects the overall weight of the sling so it lays in a more natural position, as opposed to all the others that swing around.