They should. I've got a Kapp DZ2 and I've mounted my preset 68/3k aci bulldog on it. Its the right size to wrap around the neck of the bottle. From there, I added a universal on-off (like you see on a remote or something) and connected my hose from that. Works great, but I like a quick disconnect on mine to take it apart and get to the gun quicker (maintenance, etc..) -- Cheap method.
But like the other post said, Kapp makes an adapter that will fit in the cradle and then you just screw in your preset from there. Much easier for separating the tank from the cradle. -- More expensive by 15-20 bucks, but probably very much worth the aggravation.