Well in the STL files there is only left or right not sure to be honest controller arm, and the other one is not there and if i clone in it happens to have 2 left or 2 right arms, in the 3mf file there is preloaded printing profile for the Bambu Lab X1C and in the BambuStudio i can't add my printer Creality K1C as a profile. Will be great if you provide both of the controller arms.
That is quite impressive, I'm sorry to see that! I haven't had any complaints about hat before and it has worked great for me with other materials, I don't wanna push the issue to your printer/filament but maybe the filament might not be exactly optimal for overhangs! Maybe try another color?
That's weird, I can't really say what the issue was then🤔
maybe try to use supports as an exception? the design was made to work well without but in this case I'd recommend that, it just won't look as good!