I wanted to design something with print in place hinges so it ended up being a case for my Anbernic RG Nano. Possibly not the easiest as the size of the device meant to the hinges needed to be fairly small but happy how it turned out.

I test printed quite a few and never had a failed hinge however this will depend on your device. It'll need to be fairly well tuned. Printed off one final design and its been on my device for months.

You'll also need replacement bolts as it attached at the back via these screws, I did try a pressure fit version, but soon came loose and never fitted well after that. You'll need a M1.6 10mm machine screw, I got mine from eBay pretty cheap. This is the actual item I bought: https://www.ebay.co.uk/itm/162186669992