I have searched everywhere for an insert that was anywhere close to this case I got from Amazon. No luck obviously! Which has led me to this creation. I did a lot of measuring and taking notes for making sure there is ample wiggle room for my pieces to slide in and out of the case. Some of the parts are not GoPro but most everything inside is. The insert could be a little lower in depth (40mm is current size). I designed the case using TinkerCad and a lot of patience for the program use ugh. I am posting my written measurements in case anyone needs reference to sizes for certain parts. This is a 2-plate print with dovetail tabs due to its size and printer limitations even on a Bambu Lab P1S. You can glue the 2 sections together to make it a firm permanent fit or keep them able to split just in case lol! I used a “Tree” support system, “Slim” setting, and "on build plate only" setting to make this work best. Feel free to remix this for your needs, make changes, add pieces or take and fill with something different. Any questions or thoughts on this are welcomed! Posting print videos on my YouTube and TicTok links found below. Evil's DIY and Gaming - YouTube and ticktok.com/@evils.diy.gaming