Tks Jim,
I guess I'mm looking at too much stuff on internet sites about all this.
Main thing was trying to understand my multimeter on this. I'm all good on continuity and pickup resistance.
The one that got me was setting the meter volts. On several sites I got the following info.

Once you have established which wires are pairs for each pickup
Connect one lead to one wire and the the other lead to the second wire of that pair, set the multimeter to 20DCV
Now slowly move a screwdriver or such towards the slugs if you get a positive number as it comes in contact and then goes negative as you pull away the "hot wire" is attached to the red lead of the multimeter.
If it gives a negative reading as you you the screwdriver in contact and it reads a positive number as it pulls away the hot wire would be on the black lead.
This is what was doing my head in as even the pickups that are originally in the guitar I know exactly which wires were connected to the switch and which were connected to the back of the pot as earth. These were all going negative (a minus sign) as I put the screwdriver in contact with the slugs and red lead from multimeter connected to the wire that was going to the switch and black (Comm) lead attached to the wire that was going to the back of the pot.

So I think it was information overload and I'm overthinking everything. I'll just connect it all up and see if it sounds okay, or even makes sound, then may just need some tweeking wire swapping.
Pete