Use or don't use vacuum advance on distributor???????????????????

What I learned in the last two weeks of tuning my new motor. Started with no vacuum and high initial timing for cam break-in. Reduced initial to 18 degrees and worked on carb tuning while I put about 300 miles on the car. (using wide band O2 sensor) I finally got my carb dialed in, then I went back to 20 degrees initial and hooked up the vacuum advance to ported vacuum. Put another 100 miles on the setup with good results and I think I will leave it there based on my wide band readings and overall drivability. I may try manifold vacuum advance for giggles but with 20 initial I think it would give me too much advance. BTW, my ignition is stock distributor with Pertronix 1 ignition conversion and the aftermarket mechanical advance limiter with soft springs so I am all in mechanical at 2500 RPM.
Right or wrong that is my setup, car runs and drives nice!