Baofeng AR-5RM Volume Knob Guard

This is a ground-up, proper design from scratch of a volume guard for the Baofeng AR-5RM radio. It's adapted from a UV-5R design I previously remixed, but that was just tweaking meshes in Tinkercad, whereas this is my first design from extruded curves and whatnot in serious software.

The AR-5RM is larger and heavier than the UV-5R, but it's not merely an exact scaling up, so this has a few different design solutions. It still locks in place via the antenna and holds tightly against the case geometry, and it's pretty easy to change the volume by reaching a finger around to the inside where the knob is still exposed. Note that you need to remove the knob to install or remove the guard - just pull it straight up and it should slide off the keyed shaft.

I printed it in PETG with a 0.2mm layer structural profile modified to 100% Concentric infill. Like its cousin, supports are very necessary to enable the large flat disc clamped by the antenna (only 2 layers thick to minimize signal disruption) as well as the bridge over the battery release button. Print orientation should be straight up as it appears in the STL. I used auto generated supports in a Grid style. The supports are slightly tedious to remove but they come off cleanly with the help of fine needle nosed pliers. A small amount of tearout on the antenna disc won't hurt anything but I managed to get clean separation printing on a Prusa Core One+.