Hi Mike!
Spot on. I swapped the Es from my ST80 ash with 82 JVs middle/bridge and a Rockinger Blade-scramer HB at the neck. I also changed the 2nd tone pot to 500K and rewired it to control just the HB and mix it to mid and neck as needed. I also went from 22pf to 47pf (as normally found in basses) on overall tone-control. After many tries I put a 1K resistor in parallel to the 50(?) pf vol-cap to keep brightness when turning down volume.
Needless to say I play the hard way? 8)
However, just today I gave it a try on another ST80 (1980, alder) with Es: I played blues without planning to do so. And I enjoyed it no end at all. I just tuned bass at the M4 Rhy1 down to 3, mid to 7, treblle to 5. Gave it a bit more gain. Heaven is on my side.
Cheers! Rupert