I have two MF's a 35 & a 50, both are working gas tractors. My problem is every time I remove the sediment glass bowl it is a major undertaking getting the gasket to stop leaking after I clean the bowl and put it back on the tractor. I am to the point of thinking about replacing the whole unit with a turn off valve and a regular gasoline filter. And yes I have purchased at least two new complete units and the problem still exist. Would an O ring work? Tried rubber and regular gasket material and always it is a problem. I won't even remove the bowl in the field for fear it will leak and I won't be able to get the tractor back to the barn. Any Ideas?