OK, so I did all of this.The float level was about 1/4 of an inch so way too high. Adjusted that. Made sure everything else was a clean as I could get it and gave all the jets and the compensating port a blow out with the air line.
She started first go, ran for 20 seconds. Not able to restart. Won't fire. :-(
I have another carby which I'm going to clean up and see if that goes any better.
I did give the float a shake and it sounded like it had a tiny bit of fuel in it - so I'm thinking this could be the problem - hole in the float.
Anyway... I'll keep trying. It was going so great. Determinted to get it running again.
Cheers
David.