Took the car out to Castle Combe kit at the weekend and the smell of petrol is back , it seems to be seeping out via the screw threads as mentioned by Rich.
So will need to have another go.
Other than that the car was very well behaved and the £8 seal kit sorted out my clutch problems. So all in all a very good day and a good turn out from the marlin club (I'm sure most of you can work out which one is mine !)