Meshtastic Tree RAK19003 + battery case

I intended this for deer camp. I'm going to use a wrist rocket slingshot to launch a weight attached to a fishing line to get a string up and over a high tree branch. Then, I'll replace the weight with this meshtastic case and hoist it up to the top of the tree. On a perfect sphere the size of Earth with no obstructions, line of sight at 5 feet (in your hand) is 2.7 miles. Putting this up at 30 feet increases that line of sight to 6.7 miles. This wouldn't be realistic in practice because stuff gets in the way but, you see my point how just a little bit of height can really make a difference.
This model has three parts: An outer tube, inner tube, and a cap. The battery (designed for two 18650's) and antenna wire goes in the outer tube first, then the inner tube, connect all the wires, place the RAK19003 on the spot on the inner tube and slide the inner tube into the outer tube. Test that all connections are working, then screw on the cap.
I suggest making this of PETG, ABS, or some mo