basic woodworking skills req'd. just build a frame out of balsa sticks and then sheet in between. you will have to put some thicker pieces in the corners so you can have enough material to sand to the proper curves to make your shape. but really like mentioned above, i would not plan on it lasting long if you plan to learn with a P-51. Not to be mean, but most likely it will be more than you can handle learning, and one crash will turn it back into the pile of balsa that you started with, only in slightly different arrangement.