Hey guys, new here and I was digging up some threads, because I am a proud new owner of a 70 Eb-3L. This is my first factory bass in a while, because I am a tinkerer. I have quickly discovered the same situation you guys are talking about.
I have a third variation that I did before I looked you guys up. I took out the cap and resistor, then hooked up the coil directly to the position 4 of that pole. It kinda tightens up some lower mids compared to position 1. I find it useful enough to leave it.
My bridge pickup is so much hotter than the neck in position 3. Has anyone found a way to ballance that other than using the volume knobs, since that opens its own can of worms.
Before doing that I had also replaced the 220k to a 220 ohm because I found a schematic that had a .220k, just for giggles. I liked it better, than stock, but that cap had to go. You guys seem like a good group, glad to stumble on this site.