I'm going to trythis on a prs p-90 guitar. Can anyone say what difference there is between 1.5H and & 7H in this setup. I just happen to have a 1.5H in stock. What values would work best on single coil vs. humbucker. Can I really get by without the series resisters ala craig anderton version or is the make before break or break before make the dealbreaker. Having used a gibson blueshawk, I found the the lower settings near ineffectual so I'm leaning towards andertons values on the 6-way.