I made this on my Form 2, so the tolerances are very tight. I haven't printed on an FDM printer, so you guys will have to tell me how it works. I placed a lot of areas where you can attach those mini bungies, plastic ties, rubber bands, etc. I am working on a rack with a GoPro mount, for pilots that like to get close and personal with their cameras, but are unable to because of the forward crash cams. (i just fly it backwards when i'm taking tight shots) Yes, you'll notice that it is offset from the connecting clamps. I did that on purpose so you can print two, and maximize the distance between the racks. Enjoy!