That's "hundreds and thousands". Still lotsa code, but to a degree needs never be looked at and/or is available elsewhere if.
Multiwii is configured through header file edits and set up with a configurator program.
I suppose it is a real flight controller, ppl use it to fly, but it cannot compare favorably with some flight control ecosystems that are much more sophisticated and mature, not to mention bringing 10 to 50 times the resources to bear on the tasks.
a7