Fishing plumber (water deep meter)
thingiverse
Print on whatever settings you want, no need support, bridging work well. After printing fill with ball beads for weight, and add some foam for the hook to be hooked, glue everything with hot glue and now you should go fishing to test your lake's deepness. How to do plumbing in right way: https://www.youtube.com/watch?v=4Sb0cqSndTk&t=541s
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