I was playing a show for a week - the show was titled "Music of Andrew Lloyd Webber" (Don't shoot me - it was actually a fun gig!).
... We played lots of songs from Jesus Christ Superstar
Anyone who would bust on you for that is nuts, especially if you're playing those killer bass lines from JC Superstar. My hat is off to you, Sir!
P.S. I completely agree: the MTD 535 is an absolutely incredible bass, but it's most definitely not a P-bass.

On a side note, it's been kicked out of it's spot by a vintage Ibanez strat clone MIJ sometime in the '80's.