After my car had decided to take up smoking one of the guys did have a look at things, I don't know his name but I believe he works for Rolls Royce. He told me that my wiring was of the wrong sort & I needed 12 gauge, told me my soldering on the speedo needed sorting out (I never was the worlds greatest solderer), he also spotted that the speedo & fan were rubbing on the front belt pulley & needed re-positioning, in fact the only thing I had got right was the pinion/spur gear mesh which he said was perfect. I think The wiring should be ok now it's certainly neater, what do you think I've put photos below.
Old Wiring In Car ----
01. Old Wiring.jpg
New Wiring In Car ----
02. New Wiring.jpg