Remix of NIntendo Switch Joycon Grip With Wrist Strap Holders by docvalentine.
The tiny lip on the side channels that hold the controller in were too thin and immediately snapped. This new version thickens them to 2 layers which worked wonders in rigidity while still being able to fit.
I used the Gyroid infill which worked out great. I would not recommend printing on its back with supports inside the channels. It was very difficult to extract them. Just do upright with a raft and you should be fine.