can we talk plug gaps?

I am leaving the gaps at .045, i'm just trying to learn about my coil and its strengths and weaknesses, i purchased a performance ignition rotor made by Echlin part number Mo-3000. The end of the rotor is just a little bit longer i guess and it helps reduce scattered spark inside the cap and helps get more voltage to the plugs because it gets more thru the wire then to the plug from my understanding. Anyone else here running this rotor? you can get it from napa for about 7 to 8 bucks.