OpenGarage - open-source Wifi garage opener

So have it working to some extent; however I cannot seem to get the distance portion to show data. MQTT Explorer shows that information is being received by my MQTT server (see attached screenshot). I changed this portion:

  - platform: mqtt
    name: "OpenGarage Distance"
    state_topic: "OpenGarage/OUT/JSON"
    unit_of_measurement: "cm"
    value_template: "{{ value_json.dist }}"

so that JSON was DIST and a value of 0 at least started to appear (whereas previously it was Unknown, but that’s also clearly not correct since MQTT Explorer is able to show me that values are being discovered / recorded (around 298 - 300). Is this an aspect I need to edit / alter as well?

Screen Shot 2021-04-07 at 21.59.10