I am a newbie to 3d modelling. Hopes someone who knows better than me in 3d modelling gonna make a better version. I printed mine at 120% scale (no support) to fit my pen case. you need to glue the two parts together, (see picture)
The author remixed this model.
the original was a bit small, so i remixed to a bigger version for my ipad air m1, i think this could be use on every other device.