On another note (no pun intended)...
I swapped out the two HB's that came with the kit for a pair of ToneRider Generators.
but I kept the kit supplied SC in the middle.

I'm finding switch position 2-3-4 give very low output.
Position 1 and 5 are fine !
Would this be due to the SC being a very low impedance ? (SHould I be looking for one with a higher winding or resistance rating ?)

I need to go back a few steps n this build anyway, so in a good place to pull it apart atmo ...