I wanted to take a crack at designing my own Joy-Con controller grip and this is what I ended up with. The JoyCon_Grip.stl can be used on it's own for smaller hands but can be combined with the Attachment.stl to make it more comfortable for bigger hands. Works with both left and right Joy-Cons! Prints without supports.

09/23/24 - Added an updated grip that uses a different hinge mechanism that should be much more durable and less prone to wearing out.

11/19/24 - The original file with the updated hinge incorrectly showed an “L” on both triggers. This has been fixed.

Updated one-piece version is available here: https://www.printables.com/model/432199-joycon-controller-grip-for-nintendo-switch