Oh yeah, I forgot about the 3rd and 4th rotors. Yep, I'd mount the pickups in the same positions like you said with adjustable sliders. Infact, my 20B setup has manual adustment of each pickup because it was necessary.



I marked an old pulley every 120º and tested it on a 13B. L1 was used to run both leading plugs. L2 and L3 fired into the air. All I had to do was shine the timing light on the pulley and check the alignment of each pickup. I adjusted leading and trailing this way, but will start off with leading only due to space and parts limitations.