I liked the Ipad Mini Handle by Magicstick in general but thought it could be improved. My expansion on his idea allows the handle to be held in many different ways in either portrait or landscape mode. It also changes the opening to be smaller to better fit my hand and changed the spikes to accommodate fingers better. Last, it can act as a base to hold the ipad in either portrait or landscape mode as shown in the pictures.

Creality

Ender 3

No

Yes

0.3mm shown

15% seems adequate