GoPro Dummies - With Ballast Holes

thingiverse

People are using these printable STL forms as GoPro models, but with big cutouts in the back for a reason. They're trying to get the right balance of ballast just right. Options include fishing lead, tire balancing weights or even a roll of pennies. The goal is to add enough weight so that it's less than the device itself, leaving room for some glue. A Pro-Tip: Glue in the ballast with Goop or E6000. Just enough to hold it in place and let it dry overnight at least (two days is better). Then, fill the rest of the way with hot glue while it's on a scale to get the perfect weight. Goop/E6000 evaporates a lot and gets lighter as it dries, but hot glue stays the same weight. It shouldn't matter what material you print this in or what infill settings you use. Obviously thicker infill means less ballast and more strength. I've printed a few in TPU and they come out really well and are pretty easy to cram into GoPro mounts/foam wings/etc. They don't replicate the feel of a real GoPro though, so I tend to print them in PETG or PLA now. These are modified models from GrabCAD: https://grabcad.com/library/gopro-hero4-session-1 and https://grabcad.com/library/gopro-hero-5-black-1