Alan - I was looking for that post earlier!
I posted on there at the time as I had recently replaced one of the fusible links.
This time, I will strip the fooker right back and replace them all.
Soldering the large cables is a right ballache

Reading that post brings it all back!
After some fiddling, The residual current with everything off (doors closed etc) is about 40mA. Also I have 13.5V @ the battery at idle with no load. I'm happy with this for now.
Next step is to get the ECU voltage as close as possible to this.
Thanks all for taking the time to read the post and put some thought into it!
Neil.