If you are running an external waste gate you do not have to use any type of boost controller if you do not want to. Just make sure the WG spring is matched to the boost level you want to run. There is a wide verity of springs so you should have no trouble getting the one you need. I don't know about the boost creep Chef is talking about but in my experience I have seen the most stable boost level with waste gate only. Allot of times when people get boost creep it is because of boost/vacuume leaks and not a product of the the WG.