In reply to Hortons Norton's question about the relays, they were just standard 4 pin relays I bought from Vehicle Wiring Products here in UK, I did however also buy the connector blocks that they plug into as I thought they would be easier to connect and disconnect should anything go amiss, also the blocks can connect together to make a unit. The in line fuses are the single waterproof type bought from the same company, and they are waterproof, just used the 1 for the hi & lo beams and 1 each for the horn and ignition relays.
I have the earlier airbox fitted so have a good bit of room in the battery area, I connected the panel using a support arm to the bolt that holds the back plate on the bolt just below the hole the wiring goes through. I will put some screen beading round the edges when I mount it, that way any sharp edges will be covered and it will help sort out vibes.
I can draw up the dimensions of the panel if you would like, it was very easy to throw together, using a couple of pieces of scrap metal I had lying around.
In answer to Coco, simplifying the harness is a great idea, as stated earlier you can learn a lot too about the electrics on your bike, which can only help and as a custom loom you know exactly where things are and what goes where.
If I had not added fuses and relays, my wiring would have been a lot simplier. Good idea of yours to draw it out or even do a dummy using old wiring. Best tip of all is give yourself a good bit extra on each wire as you do not want to finish it and discover the wire won't reach the connection!!!
You know what they say... " a snip in the wrong place...."
This forum has helped me immensely I would have struggled without the help
Good luck