When that unfortunate gun accident happened, Felix had a couple of EBs, his "wife" (referring to the bass, not Gail), now gathering French fries grease in a Hard Rock Cafe (Toronto?), the one I have (his "second" or "spare") and at least one other - which might have been an RI. They went on sale from his estate - with a lifelong Pappalardi/Mountain fan, who knew him personally, taking care of the sales. I didn't buy it at the time for the Pappalardi connection (I knew very little outside of Mississippi Queen at that time), but because it was affordable since it was a refin (allegedly done by Gibson), I think it cost me US-$ 5.000 or something. It either had no serial number to begin with or that was overpainted (as was the f hole), but it's a fifties model alright, banjo tuners ((which are a drag), single coil pup etc.
I never use that coil tap thingy, but, yeah, it might be one, doesn't cut power, but midrange frequencies, the sound becomes scooped. The only thing I have changed on it is replace the bar bridge against that Schaller monstrosity that Jack Bruce had on his RAH reunion shwos EB too.