OK, well here are a couple of topics I came up with for discussion for an instructional video:

Airplane setup,
Tx setup to include mix
Tricks for 3D trim setups
Stages to learning 3D.... basic 3D elements and building...
Demonstrating in flight.
IMAC stuff to boot, for example snap setups, airplane trim and maneuver builds (i.e., building blocks).

Let me know if these topics are of interest to you...or other suggestions of topics you would like me to cover.

Don