Happy to assist!
So the Delta systems carry 1 bottle only, if you wanted to have the flexibility to choose 1 or 2 bottles at any time, I would look at the dual carriers. The Delta 400/425 models are very good however as far as their adjustability.
Cages are by far the #1 thing to look at if you are launching bottles, but the secondary factory is the position of the cage. For the Gorilla cages, the more upright the cage can be, the better chances of preventing launching. You not only have carrier position adjustability with the Delta 400/425, but also cage angle which really helps dial in that position. They also come with a Gorilla cage already.
As far as compatibility - just make sure you check your saddle to ensure it is compatible with the appropriate carrier. We have a helpful guide
here so you can check. If it is not on there or you don't know the name, we can check compatibility for you.
Candice Turner
CEO
XLAB - Aerodynamic Triathlon Accessories
Dawn to Dusk - Off-road Specific Storage Accessories
http://www.XLAB-USA.com http://www.dawntodusk.bike