We have progress!!! Looked to wire in the Acewell gauge today, a couple of minor hiccups 1) I kept blowing fuses on the main feed 2) the high beam light is on all the time.
Turns out I had connected 2 blocks incorrectly in the headlight bucket (what a twat), causing me to go through 4 x 7.5A fuses. Quickly resolved after I eventually found the problem.
The main beam issue I will need to look into further, I suspect I've tapped into the wrong feed, I will report back once I confirm.
All done in the end and I've started to setup the gauge. Here it is in action (love the way the needle sweeps on startup):
http://youtu.be/n8BtjG8Unbc
I still need to confirm a few things to finish setting it up:
1. How many rotations the engine makes per coil fire (for the tacho)
2. What RPM I set the shift light
3. What warning temp I set for the motor