I made a mouse can pipe for my O.S. 60FP that I have mounted on my Killer Chaos. The only reason I put the pipe on was to move the CG aft without adding tail weight. The increase in power from stock is a lot, however, I am having a problem. I cannot lean out the idle mixture enough. It has an airbleed carb and the needle is all the way out. The high end mixture doesn't seem to be that critical....it runs over a wide range of the mixture screw. Would it be advisable to drill the bleed hole slightly larger? Has anyone else had this problem?

Thanks

Ed