Made this side for the Peon230. It'll help keep components safe inside and keep dirt out. I put GPS mounts to the side and they'll accept the common 4mm rod that comes with HolyBro (and a few others) GPS systems. There are vents in the side to help keep your stack cool. I have found that if the GPS mounting holes are a little snug just hit em with a drill bit quick to clean them up a little. I have mounted these to both 3D printed and standard nylon standoffs. To make both sides just simply mirror the image in your 3D slicer. Made for the 40mm length standoff. If you print this and have the time, please upload a pic to the "I Made One" tab. I love seeing my designs get printed :) Thanks!