I printed the T1 case to hold in my hands and found it boxy and uncomfortable. So, I went back and redesigned the whole thing to actually feel good, thinner overall, with big fillets at the bottom for two-handed grip. It’s amazing what holding a prototype will teach you that CAD never will.

Other upgrades:

• Front hole for the radiation sensor. (I mean lets be honest we really want to be as far away as possible even if it's 4 inches) 

• Small window under the display for the TSL2591 High Dynamic Range Digital Light Sensor. Placed so you don’t shadow it or block it with your fingers, and it’ll double as an ambient light sensor for auto-adjusting display contrast. \o/

• Larger vent near the screen: Expanded by 3–4mm in each direction, with 1mm steel wire mesh on the inside for protection. Nothing says “field-ready” like mesh that can stop a grasshopper?

• Active airflow: Added a 17x17mm, 3V fan to blow air in. This means sensors react faster, and in the worst-case scenario, it just might save your bacon. (this should allow for positive air flow and also cool off internal electronics, yea I'm looking at you Google Coral Dev Mini!) 

• Tighter clamshell fit... You can actually pick it up and shake it now, no rattles, crazy right?

Pro tip: If you do build this, don’t even think about bringing it through TSA. Especially not with Play-Doh inside. I’m not responsible for the “sir, please step over here” moment.

Redesign after T1 design.