Ill singist meant that tonight was bass, drums and guitar so we spent some time looking at arrangements and texture to the material - useful session and my DHA Vt2 Custom - P bass - Ampeg sound was (chef's kiss).
Don't learn the songs until 'they should be straightforward' - learn them until you KNOW that they're straightforward, this should cancel out any nerves/unexpected nakedness etc...
If you pop the top then you should be able to see the value and taper of the pots. I’ve got an old TC head that’s broken that I don’t mind desoldering them on mine if they’re the same value.