There are 3 models, because you need to print a hinge part laying on the side, so the solid line of filament makes a continuous C shape - it's much more strong structurally.
So you either:
- print the whole thing on supports, laying on its side
- print two parts - the BASE and TOP Models, and then glue them together. It's designed that the screw holds them together, so you don't actually _need_ any glue, it's just for the part so it holds up together
30% fill, 4 lines wall - is plenty enough.
Whole part printed with PLA tested on Fiesta '07 - works perfectly (it's 11-th iteration - I made sure it fits!)
Glued part printed out of two models - TOP and BASE tested on Fiesta '07 - it's even better.
The Original part is made of POM (Polyoxymethylene) plastic, ABS and PLA+ works good, I beefed up the wall, so it's plenty strong
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