I already have it dialed in with springs and the slot limited..so where should i hook the vacuum up to, the intake or carb? Also, when adjusting the can through the nipple, what exactly does that do? Does it limit the amount of cruising advance or what? I just really dont understand how the vacuum advance works or comes into play..I understand the initial and total and like i said, i already dialed those in a long time ago and it works well, but want to try the vacuum advance too!