I'm not saying to avoid the technical discussion. I'm only suggesting that it be labeled with a subheading that clearly identifies it as Extra Background Reading and separate from the basic "use a minimum 15% nitro fuel, open the needle valve 2.5 turns, prime a single drop in the exhaust then connect the battery and .... " sort of stuff.

From there you can work into the internal care and rebuild steps, offer pics of the various Cox configurations and similar increasingly more advanced stuff.