After sitting for a week, I have:
Adjusted the truss rod so as to straighten the neck,
Added some D'Addario strings,
Adjusted the string action and intonation.

Also plugged it in, and it sounds like a bass Very happy with the way it sounds. I'm not sure if I'm up to a sound sample.

So, a HUGE thankyou to Rabbit for the one-off '51 p bass single coil pickup with an ironbark cover. It is a great success. I'm very impressed with it. If you set up production, I will order some more.