Hi Dave,

I have another gallon through this engine and am getting a little leaner on the top end and the power it starting to come up too. It's still a fat on the low end with the butterfly valve drilled to 3/32" and the regulator screw flush with the housing. Before I go up to the next size in my drill index, 1/8", I wanted to make sure that it's the right thing to do. Is 1/8 too big? Can I get the lower end leaner with the regulator? The mid range seems fine and throttle response is great. It still shakes a great deal on the low end though...

TIA for your continued help!