May need to scale up by 25.4
Designed this case to hook my EV100 DVR onto my Fatshark head strap. Works perfectly and has accessibility to all the buttons you need.
Print on it's side with the large opening facing up. You may need to pry the "large clip" away from the "small hook" since they tend to get fused together a little bit during printing.
To install - slide the DVR into the case. Pry the "large clip" open slide in the goggle's strap, then tuck the "large clip" inside the "small hook" to secure it.
Made a CAD model of the DVR and then modeled the case around it, ensuring to have enough interference to keep a friction fit with the DVR and case.