i think haveing one or the other would be a better idea. using both wont really work. if the beadlock rim is the usual design. ive installed a few sets of stauns as well, and pretty much all of them leaked. and everyone else that has installed them had leaks as well. once you fix the leaks though they seem to hold up. the problem was you had to use the special tubes from staun, which is not next door to your sister. you gotta order them in and wait... wait... wait.
i think there are a couple new companies using hte same idea now but with motorbike tubes, which you can pick up your self at any bike shop.
the staun is nice for the double beadlock system, the regualr rim beadlock is nice for simplicity sake and you can do them yourself at home.