I've had my CarLoop for a couple days but the first thing I wanted to do was get an enclosure around it and my Particle Photon. I sat down and designed one in Fusion 360 and made the STL files available on Thingiverse for printing. So anyone with a 3D printer can make a case in about 1.5 hours of printing.
I designed the case to be a SnapFit case which means there are no screws. I also left a plug hole exposed to connect a USB cable to the Particle Photon. I placed a 3MM hole just above the Particle Photon's Status LED so you can see the status. You can also cut a small piece of 3mm Clear or Translucent filament and place it in the hole and it acts like a light pipe showing the status a little more vividly.
This is simply my first iteration. Might tweak it for an antenna or if I decide to get a GPS, I'll make a deeper case. I'll be sure to share any alterations here.
Link to download on Thingiverse is here --> CarLoop and Particle Photon Enclosure
Have fun and happy printing!