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There is no such thing as a stupid question when wanting to learn. If one does not ask questions one will not learn. Servo horns come in different shapes and sizes. Some are thicker than others. The thicker ones you can get by with just screwing and unscrewing the ball from the horn. On the thinner ones, it is best to use a screw that you can install a nut on the back to keep it from pulling out. When using a nut on the back it is best to put a little locktite on the end of the threaded bolt. If your using a regular screw without a nut make sure the screw goes all the way through. Be careful not to over tighten! If you strip the threads, then by all means install a threaded bolt with a nut on the back. As for tools, Eflite has a 5 piece driver set, which is pretty handy for micro helis. It includes, 2 phillip screw drivers, 1 regular flat screw driver, and 2 hex nut drivers. (the hex nut drivers are like allen wrench type) I hope this helps. Happy Flyin!