Alternative mounting solution for Orange Pi Zero 3 Case

This is a remix for @TheParanoidEn_917266 Orange Pi Zero 3 Case. I was having a hard time with the original mounting solution (probably a skill issue on my part lol) so I adapted it to use a different mounting style, based on @bassamanator's Sovol SV06/Plus Frame Mounting Solution 2040 Extrusions. Should fit any printer with a 2040 V-slot. I'm only uploading the modified bases and matching clips, the different case tops models can be obtained from the original model (https://www.printables.com/model/542569-orange-pi-zero-3-case).