Just got back from running my engine for the first time Woo Hoo. Had a hard tome trying to get it to start for the first time. I had to shoot some gas into the carb to get it to start. Then it ran like !@#$%. Checked the mixture screws and found they were way off from what the factory setting is supposed to be. I set them back to factory specs and it fired right up. It was way too lean before. The low end was only open about a 1/3 turn and the high end about 3/4 turn. I ran 6 or 7 tanks through it and got it tuned up so I get a good idle at 1650 and top end is 6500 with a smooth transition. I am usinga Xoar 22X8 and a Globee tack. I would guess this will improve as it breaks in. I am using a Bisson Pitts Wrap around and I recall someone saying it will knock down the high end 200 to 300 rpm below the stock muffler. I though I had put my first DL on this plane, but I see I got them mixed up. This is the second one I bought, so number 1 will be going in my Giant Stinger. did I mention I was pumped Here are a couple of pics I took with my cell phone...