That inflatable mast float on that Farrier Tri is really cool. Someone should make an market one like that for cats that can be easily installed after market. It doesn't have to have a fancy CO2 inflator either. AN inflation hose of some type that either travels through the mast to a port at the bottom or attached to the outside of the mast somehow that can be inflated manually even with a small pump or something This would be more to help you get right after a turtle than to prevent one probably) The auto or selected CO2 inflation could be cool as well. But you would not have to have a big float on the top unless you needed it. It would need to be reusable of course not like an airbag that can't be repacked after use.