How do you check if a 3D model is actually printable before downloading it? Do you look for specific file formats, read comments, or use preview tools?

I learned this the hard way after wasting filament on a model that looked perfect on screen but turned into a spaghetti mess halfway through. Before I download anything, I always open the file in a simple slicing software and rotate the view to check for non manifold edges or floating vertices. When I browse for high detailed 3d models on a marketplace like Gambody, I first scan the comments for real prints people have posted because shadows and renders can hide bad geometry. I also verify the file format is .STL or .3MF since those are standard, and I avoid OBJ unless I’m ready to repair it. Another quick trick is running the mesh through Windows 3D Builder’s repair tool for free. The community feedback from actual buyers has saved me more times than any preview tool ever could.