Meshtastic device suggestion: a physical switch, key combo, or long-press that allows you to lock and unlock the buttons to prevent accidental presses.
Also, if you're selling nodes that have the USB charging port on the end of the device opposite the antenna connector (Meshnology Heltec V3), some sort of 90 degree elbow antenna adapter might be a nice accessory to add to the kit, assuming it's necessary to keep the node's antenna vertical during charging.