Make a video on how tight bracing cross wires should be inside of wings and how to true them all up. Because I really don't know. I've seen a video somewhere of how tight control cables should be and how to tighen them up, something like around 20 pounds? Don't remember off hand... probably wrong.

Make a video on how to keep carpenter bumble bees from drilling holes in your wing spars and other wooden plane parts, which is obviously structurally dangerous.