Bad booster?

From: DEMONIC- "Where's the mixed review? Nothing wrong w Booster Dewey's work. They have a stellar reputation. Used them myself for my 69 Bendix booster."

Answer to DEMONIC: See post # 16 in this thread from: HULA - Yeah when I got it back the brakes were ok, but not optimal so I called him and he said it takes 20 inHg to operate it efficiently and I had 14-15 so I opted to use a vacuum canister and hide it. How much vacuum do you have? Have a cam?