Every throw tells a story.
Compare three flights, make one change, and try again.
Pick a clear space
Throw at ground level into a clear space away from faces, roads, animals, stairs, and breakable objects. A still indoor space makes comparisons easier.
Choose one question
For example: does a tiny upward bend at the back of both wings reduce a dive? Keep everything else the same.
Record three throws
Measure straight from your starting line to the first landing point. Use the same units each time. Write down the plane, paper, conditions, distance, and what happened.
Compare, then repeat
Put your three distances in order. The middle one is the median. Record the shortest and longest too. Make one small change, then repeat. A single lucky throw is not the whole story.