@jonniedie , as you’re a very nice developer for simulation in Julia, I leave you a message:
I implemented the logging mechanism based on SavingCallback in FlightSims.jl (See #77 or current master
branch).
It may have potential error though.
Note that this package may be bit untidy 'cause it’s dedicated for my team until now .
EDIT: nested logging can be found in test/nested_envs.jl.