Thanks for all the help! I think you guys solved the problem! I didnt realize that the rubber bands should be installed from front to back. I had some suspicions that it was something like that. I have been using only 4 rubber bands also. I am going to double that and see what happens. I also switched the crystals back where they belong(bad beginner idea). I will also try the popcicle stick thing and see if I can make the plane fly better under power. I dont want it to climb under power, just stay level. So where should I ad the popcicle sticks? leading or trailing edge of the wing?