GolfClubPassTrainer

This is a Laser Golf Club Swing Path Trainer. Don't ask me why would anybody want one - I do not play golf. However my golfer friend swears by it. Says it helps him do slow motion practice at home ensuring the laser dots always point to a straight line to the target (taped masking tape on the floor). He described the design and I modeled it in Fusion 360 and printed the gadget for him. To complete the gadget, you will need two inexpensive laser pointers. We used the following $9.99 model from Amazon:
https://www.amazon.com/dp/B09V1C8827?ref=ppx_yo2ov_dt_b_product_details&th=1
The pointer is turned ON by rotating it so that the switch button would slide into the groove and get depressed. This also helps with preventing the laser pointer from flying away during an energetic swing (though this is mostly intended for martial art style slow motion practice). I included a parametrized f3d design file so that you may adjust it to fit your club and laser pointers.