https://www.youtube.com/watch?v=Ospa8O0lFXo this video dont really tell me much but thats because this is not the project ama be working on. am only putting this video link because i might change my mind. this video then would be very heplfull. after i change my mind i would probably change my mind again. that would be because making a jet would be more easy. all the videos would look easy until i actually work on them. after i do that then we would see if it was easy. if non of my inventions work i think ama give up. this robot would need a lot of materials to make because its more advance. the only think i got out this video was on how accurate you have to be.