Jim, I have to agree with you on this one. There are a lot of things that cost more than fuel, Like not having enough power to save a plane when you need it. My us41 is to heavy and the stinger with it is 16 lbs. should not be over 14lbs. with the right engine. It flys o.k. but could sure use more power. I should just change engines and be done with it. Thanks for your post, Wayne M