After spending a couple of hours on it this afternoon I'm just starting to realise how long it going to take me to balance the nut height, bridge height and intonation right.

I also know why they had the nut cut for Rickenbacker stringing - the bridge is designed that way too. So I'm just going to aim to get the main strings right and the octave strings will be out intonation wise, but that is part of the charm of 12 strings anyway.