Bone conductor transducer

3W transducer that emits sound directly to a flat surface instead of a moving cone

laser sensor (!) and safety goggles that block laser glare

Time of Flight sensor

1/4 inch NPT plugs for pressure pot

flight case so I'm not carrying around the Mercator in a rubbish old rucksac

Blue Robotics 1m additional cable

5 more Blue Robotics wet penetrators and spare o-rings

Blue Robotics cable repair kit - silicone tape, etc.

new miniature wiring harnesses for building v2

I2S audio amp

DAC audio amp

ESP32-CAM ESP32 development board with camera, with USB/serial adaptor board

I feel like I'm turning into Doc Brown... unfortunately Mr Fusion is beyond me.