Thanks for the info Pete. You did a nice job! From a performance perspective I think it's only noticeable at sustained wide open throttle. When I was setting my float heights last year I noticed the needle jiggling around as the bowl filled, and the petrol was spurting out over the gasket height, so in my mind it must cause the gasket to get wetter then it needs to be. So for me it was purely as a design improvement. I guess even a hole drilled below the top would do the same job. Cheers, Cliff.