So this may find it’s wayback to me...
View attachment 3169888
I ordered it as a “JJ” but it was modded after I sold it. The original Bart J pickups were replaced by Keith at the Roscoe factory. The replacement pickups are Roscoe Barts. The top switch is series/parallel for the top pickup, the bottom switch has same function for bottom pickup. The preamp is the original Bart 3-band.
The new setup is very versatile. Blend one pickup series with one parallel, add some EQ tweaks for tonal variety, and achieve sounds not available with the original Barts. Or stay with both pickups serial or parallel. Lots of options.
Maybe I’ll quit trying to convince myself I should have a passive 4 string P and just go back to my original plan from a few year ago of having a pair of Roscoe 5’s fretted and fretless and call it good.