Thanks for looking at the guitar Jonathan, I think the raising of the tailpiece may just do the trick now, as I never noticed that it was making the strings rub against the edge of the saddle. I'm still going to change strings often though!!
And when I do change I'll change half at once before the other 3 so the tailpiece doesn't move.
Will definitely consider the Faber or Tonepro in the future, just hoping this fixes what was troubling me before.
Disconnecting the tone pot made the guitar brighter and somewhat louder, as I had to raise my noise suppressor threshold level! Presumably as the signal was now hotter, no more complaints from Mr bass man for being too "low-endy" haha.