I purchased a macro controller some time back and, unfortunately, one of the yorkies liked the taste of the thumb stick caps and proceeded to chew them off.

So, here is a replacement cap. I found the inner ABS molded piece is different on several controllers, probably due to different manufacturers. So the bottom opening may or may not fit your ABS stick. Use a boolen or resize the inner polygons to enlarge it in any mesh app so it fits your stick(s).

I printed mine in Flex EcoPLA by FormFutura. Offers slightly more cush than the stock 360 stick cap. If you want even more flex, print in NinjaFlex.

I used a dual extruder and printed the support material in ABS. If you take it off the platform as soon as its printed, the ABS support fill will pop right out with no cleanup needed (at least with Flex TPS).

The inner cutout is slightly beveled inward so it should snap right on. I put a dab of hot glue in the center for good measure. Its made it for a few game sessions and hasn't come off again.