as someone with a spool up front (ford dana 44), I can tell you that the chances of disengaging the CAD when you really need to will be almost zero. with no hope of differentiation, the system binds up and won't even let you steer. You'd have to find a way to eliminate all of the bind just for the hope of getting the CAD to let go (backing up, putting it into 2wd, etc.). And if you are successful, you're now sending ALL that power through one little 260 joint. Sounds like a recipe for disaster. :(
I hate my front spool and it will be swapped out for a regular locker at the first opportunity.