Alright, final version. while this may be my BEST plane I have ever built, I'm going to stop working on it. group 1 is afterburner. definetly don't use if you don't have a whole lot of fuel... it guzzles that stuff rapidly. group 7 is for parachutes but they don't slow you down lots, only to about 100 Mph. still better if you use VIOL to stop. thanks to everyone who enjoyed using this plane, if you ever need something such as a thing fixed for this plane or something you want me to build, let me know. FYI the wings tend to wobble when bouncing up and down. they don't break but do wobble. I tried to fix it but I wanted to leave it. have fun!