Not to be disrespectful but unless you had reason to think that they might want to harm you, I believe you may have missed a wonderful opportunity to 1. have some free help, 2. provide a teachable moment, 3. become a mentor to some that may, just may, follow in your footsteps and become future world champs. The reason I write this is because I too faced just such a situation a few years ago and after talking with them and spending a few Saturdays guiding them, all three young men became really proficient in minimum time before high school activities, girls, after school jobs and sports took the lead. One year, they even participated in the Ringmaster Fly-A-Thon and posted some pretty big numbers! Granted they never built a plane, they just flew mine, but I made sure they learned all the safety rules and fundamentals of fueling, starting, inspecting and maintaining all of the equipment. A few months ago I was informed that the oldest of the three had graduated and joined the Navy and is serving on one of the carriers! The second oldest is about to graduate high school and head for college, the family of the youngest moved to NC, I believe, and he is attending high school up there, I believe. I really enjoyed and very much miss these young men and the times I had with them. Hopefully, a bunch more will come along before I'm too old to work with them.