The approach
Start with the right question.
Plan parts, budget, workshop hazards and a way to test the finished object.
In practice
Make it useful on the water.
Date revisions so an improved design does not erase an earlier experiment.
Keep learning
Connect the dots.
Use this guide as a starting point, then compare it with the water you're fishing, the tackle you're using, and your own observations. Good fishing knowledge grows through real practice.