i dont understand why:

1) the boost creeping to the set amount desired would be such a big issue

2) if your tune for speed density is your response to (1) then, why not invest in an electronic boost controller? i have never understood why people cheap out on arguably the most important piece of equipment for the life of the engine (when modifying them).

what are you going to do when atmospheric pressure changes? what about temperature? your manual boost controller will not account for variations in anything... it is a hole that lets xx ammount of air through. the density of that air could be a little or a lot, but the size of that hole will not change, which will in turn change your boost reading/setting.

seems silly to me to cheap out on it when you can find good ebc's for $200