Changed the cdi box last night. I had 6 flights this morning without any problems whatsoever. I am back to work tonight so when i get home next week i will change the regulator back to the original just to confirm that the reg. is OK.

At the end of the day when the dust had settled, the problem came down to 2 things.

1) The back plate assembly was faulty.

2) The cdi box was faulty.

The replacement (warranty) back plate assembly arrived today. I will call the distributor later to arrange a cdi box.

Thanks to all for your advice. It was greatly appreciated. For me it's still a learning curve with these things when something is wrong.

I will keep you informed if there are any further developments.

Regards
Scott