I am having some gas seep by my cutoff valve on my 1936 A. It is the 1/4 turn type. My question is when I unscrew the valve from the top of the sediment bowl it does not seem to want to come out so is there something I have to remove on the inside to remove it. I have been fooling with it without removing the sediment bowl but does that have to come off as well to complete this task. Want to replace the valve but everyone wants to sell me a complete sediment bowl. Where would one find the valve only. As an after thought I have been fooling with this a few months and have just opened the drain on the bottom of the carb bowl and let any gas that gets by shut-off drain into a can. Is there any downside to doing this. Thanks for any info