I do have an XLS 46 and still have the problem. The carbs are just not the quality of OS, but that doesn't mean they won't run well and fly planes well. I run a couple 52 Mag 4 strokes on 40 size planes that i like and they were a real bargin. My GMS 47 is a real animal in a fun fly type plane, had to mess with it to make it run good. Thats the part I elect not to do anymore.