UPDATE: two things: The volume pot became a little iffy, so I took the bass to KiOgon (John) of this parish for sympathetic replacement of the electrics, which included CTS pots, Switchcraft Jack, vintage wiring and a spiffy orange Sprague Pacer 0.1uF cap. Great job by John, as per usual...
The other thing is, I gigged the bass again last night. Frantic gig as there were lots of other bands on the bill, so to save on arse pain I went through the PA (using my Diamond BCP-1). The monitoring wasn't all that, so I played some of the set 'blind' so to speak, but in certain numbers I could hear enough to please me. I was told afterwards (by someone I trust) that the FOH bass sound was excellent, so all good.
Needless to say it played incredibly well - very light, very easy low action with flats - and I avoided the usual 'immobility of fretting hand due to humidity and sweat' because I previously sanded the neck to the wood and applied several coats of Tru-Oil, thus making an already-great neck super-slick and satiny-smooth.
I'm going to put my head on the block and say it's definitely a keeper. I may find a better P Bass than this, but it will need to be something very special indeed before I would even consider moving this one on. If you've not played a Road Worn P and you're after a 'vintage' sound and feel, I strongly suggest you get out there and try one.