I was never happy with the sharp corner of the Ally, and most grip designs I saw added too much bulk. I previously tried remixing another grip to mixed success, but this time I have designed a new grip from the ground up. I drew inspiration from the designs of the Steam Deck and Legion Go to better shape the handles and palm rest area. The grip also attaches with no adhesive (though I am not responsible if you hold your ally by the grip and drop it!).
Recommend printing upright with tree supports on plate only to support the area for the macro button cutout. To print the left side, just mirror the object in your slicer.
UPDATE - new “compact” version. I think I like this one better. Removed a bit of unnecessary area at the top of the grip, made the palm area tighter to the body of the ally. Also post processed to smooth some corners more.
The author marked this model as their own original creation.