I was wondering if the air bleed valve could be used to solve the problem? With an air bleed carb can you set a reliable idle that works in the air? Is the problem the mid range? If the mid range is the problem wouldn’t the air bleed valve at least improve it. I know what’s it’s like to be going around multiple times on landings. I joke about that’s what the cut off switch is for. Most of the guys in my club are flying smaller cub models with the Saito gas 4 strokes. They dead stick quite a bit. I was hoping to get a 10cc nitro engine that converts and is reliable. The small cubs come in relatively quick even on idle and the plane just keeps ongoing even on the ground. We run out of runway. I actually added skis to my plane to create more drag on the ground. I don’t need a high performance engine just one that is reliable. Thanks for the explanation.