Arundels are now being made in China. Great cage. 0 ejections after 2 years of riding. I used to eject monthly with steel and Ti cages. I also have the garage specials. The Chinese versions are smoother and glossy. Same basic design.
Here is the bottom line on bottle cages: Metal cages will eventually bend and therefore are prone to ejecting bottles when it is most inconvenient. Carbon cages will not bend over time, and therefore are not prone to ejecting at all. Carbon will break before it bends, but that is only if you really stress it, and putting a bottle in and out will not stress the carbon to the breaking point.