I've ordered the Mini 3 Pro (never owned any DJI previously), and I tend to design and 3D-print stuff for lots of things I purchase. I do own a Fimi X8 SE that hasn't seen much use for a long time (I have never really been satisfied with it, for different reasons), and I designed different things for that (my gimbal protector for it was hugely popular). If I decide to keep my Mini 3 Pro order, I will probably design stuff for that as well, including a custom sun shade for the RC.
I will most likely sell the files though (as in fairly cheap, but not free).