Hi,  I’m prototyping a small bracket for holding a plastic cover in place—roughly 60 × 30 × 10 mm, with two hooks and two screw holes (M3) on the top side. I printed it in PLA with 20% infill and a 2 mm wall, but one of the hooks cracked under moderate flexing during assembly. I’m trying to find the right balance between strength and cost—do you think increasing the wall thickness or switching to a higher infill density would be more effective to reinforce the hooks without overbuilding the rest?