can i rely on this manual boost controller to control the boost on my stock turbo?

also, when the manufacturer says its manual bc isnt a bleed-valve, what does that mean? what's a bleedvalve?

A mbc will work fine. What the bleed valve type does is lets some of the air out so the WGA only see X amount of boost and adjusts the wastegate accordingly. While the other type uses a spring/ball bearing to keep the pressure from reaching the WGA accomplishing the same thing.

ah..great..thanx..