Hello!

This model will allow you to use an 18mm NATO strap of your choice with your Casio 3502 watch. While it does stick out from your wrist more, I find it to be much more comfortable than the stock strap.

Installation Instructions:
1) Remove the original straps using a pin removal tool.
2) Remove the 4 screws from the back of the watch.

3) Remove all supports from the model carefully. A metal spudger is an ideal tool for this.
4) Run the strap through the back of the adaptor. You will be able to guide it through with a small screwdriver to help push it through, as the back is open.
5) Mount the bracket to the rear plate of the watch. Take the 4 original screws and run them through the mounting holes. (You may need to widen the holes slightly before the screws take)

6) ???

7) Profit!

I will try and make some tweaks to the model in the future to improve the mounting holes and increase strength.

Print Recommendations:

Print the model with the gap facing down, supports everywhere. Line supports are fine.

I recommend printing slowly unless you have a fancy printer like a Bambu. I printed this in PETG on my heavily modified Ender 3 V2 at 25mm/s.