Hi Guys, just come up from the workshop and had some success, I post at the end but to answer some questions and make some comments....
question... did you assemble the plug boot with the little wire spring that goes around the tip of the spark plug?
The "plug boot" was already attached to the ignition box (and wire) when it arrived and so yes it does have the wire spring that goes around the tip and also it has the C clip which tightens the casing of the plug cap onto the plug nut outer casing for the ground. The ignition system does come with the other large plug cap in a packet so the current cm-6 would need to be removed.
Bluechip and Rob - I`m going to go for one of those even when it is setup. I think it`ll look pretty cool and it`ll show if there is a fault with the ignition system.
Chris you say you can hear the spark ,is it in the right place inside the cylinder or is if outside , i.e. plug cap shorting
I`ve just had a listen and both Doug and Stuart you mention that I shouldn`t hear the spark. I can 100% hear the spark but it is a dull click that seems to come from inside the cylinder not outside. I turned all the lights off and couldn`t see anything around the case just the spark at the tip.
Anyway, finally something to show you.

I just think it is still far too temperamental! There seems little consistency, you think it needs a richer mixture and it cuts out. Then you try a leaner mixture, it cuts out. Then for example, in the video below, I tried starting up after the last attempt and it was just dead! I hope that makes sense...I don`t feel as though I can find "best" settings because there seems now pattern of how to get there.
Well, I`m getting somewhere..... at least enough for a video this time. You guys know infinately more than me, does the video indicate any obvious issues as to why it is stopping so suddenly.

I just want to thank everyone for their continued posts in helping me get this running. I know I ask a lot of questions and can be a bit of a pita but I can assure you I put in the same efforts in my time in the workshop!
Chris