Reflection

As I decided to use slightly more infill for this model, the print took quite some time (then again, most 3D prints take hours). In the end, the extra infill was more just for the sake of adding a little bit of heft. One thing I learned is that when modeling for the purpose of 3D printing, some degree of tolerance is needed (I used about 0.3-0.5mm tolerance in my model. I also learned that PLA is quite brittle (when I broke a support off, a piece flew into my eye, so that was fun). If I could do this again, I would probably design the "rail" for the sliding top piece a bit differently. Rather than using crossbars (they appear to be quite fragile), I would probably use something similar to the nubs that hold old CD covers in place in jewel cases. That would likely decrease the need for support quite drastically, making the process of cleaning up the print much easier in the end. I would also consider using ABS instead of PLA and then treating the print with acetone vapors to smooth off the edges While that can be more time consuming than the sanding and sealing using with PLA prints, it can get closer to the quality of injection-molded prints in my experience.