Excellent, thank you! I played around with it for a bit, but I got stuck trying to look for an ESP8266 footprint and quit. It does look very promising overall, though.
I've built one of these. Good fun, but of course battery life does not match the 7+ years of the original. I think mine lasted close to a year?
If I remember correctly the magnetometer was end of life, but not critial to it's operation.
I'm not the original author, but I am considering ordering a few new boards and maybe the components. If you're really interested, give a shout on github: https://github.com/carrotIndustries/pluto/issues/1
Disclaimer: Dune 3D developer here.