ThermoPro remote sensor mounting box

I purchased a ThermoPro indoor/outdoor thermometer from Amazon to mount in my travel trailer. https://www.amazon.com/gp/product/B07L82PF1Z/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1
The mounting provided for the remote sensor is pitiful, a single keyhole slot for one screw, not good mounting for a road-going vehicle. Also "waterproof" in the summary seems to mean "don't get it wet" as described in the user manual. So, I designed and printed a little box to contain the remote unit and mounted it under my trailer. It should provide a solid mount, protect it from road debris, and keep most water off the sensor. The box has two holes lining up with the actual sensors so it should still read with reasonable responsiveness.

ThermoPro makes several different products that use this same sensor box, so the box should be good for any of them. The sensor fits snugly with almost no wiggle room so it doesn't vibrate around.

There are four mounting holes in the bottom of the box designe