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On the original design I had incorporated a feed/scavenge oiling system. It worked but I wasn't happy with it. I went back to the plans I have for the Morton M5 and to see how they fueled it. The carb feeds the crankcase with a gas/oil mixture which is then drawn through the back of the crankcase and out the intake pipes to feed the cylinders. On it's way the mixture lubes all the internals.