Don't fear crashing too much. Even if you wreck your Nexstar after your guarantee period, your radio equipment and engine will most likely survive even a serious crash unscathed. You can buy a Nexstar ARF airframe to replace it for $99.99, then put your servos, receiver, battery, and engine in the new ARF to get flying again. RTFs are how we learn to fly, wrecking RTFs is how we learn to build ARFs and Kits!