Manifold Vacuum Experiment

Aight den. I have an update. I can tell beyond a shadow of a doubt the engine idles cleaner. By a good bit. It also has more balls at part throttle pulling up inclines. A lot more, actually. No spark knock whatsoever with the can turned all the way clockwise, so I don't think any adjustment is necessary there. All in all I think this was a beneficial mod and I may revisit it on Vixen. I didn't put the vacuum gauge on it but it will in the coming days.
Have you got any idea as to how your centrifugal curve is laid out? Interested in the interaction between the 2.