Years ago I played an EB-2D with the choke...I was blown away at how cool it sounded...for a short scale bass...
I modded my EB-2D with a pickup switch from a 3-pickup Les Paul in place of the baritone. Middle position takes the filter circuit out completely (stock, there was always filtering at play in both settings). That thing sounds great wide open.
Look forward to a thread about the build... there are not enough good/interesting explorer basses out there, that's for sure.