They make a heavy brass spinner that would really help if you need weight. Nice job on the build, you probably built it better than you could have bought. If you have the time and inclination, you may want to add large dark stripes to the underside of the wing to make for as much dark on the bottom, light on the top contrast as you can make it. It will prove to be helpful later on when / after you solo to help keep orientation. Some days, because of the sun and clouds, all colors disappear, and only when you bank will the light on top, dark on the bottom help out. You will learn to "keep it close in" due to that. Most people have a tendency to fly a half mile away before they realize it, and orientation is important in getting it back to you. Just something to think about. You are about to have the time of your life as you learn all this! Have fun!