The only reason I'm second-guessing is because we're about to do a lot more 3-man this year, and I want to have it right...
In the FED official's manual (2003-5), the diagram on p. 51 shows the frontcourt primary coverage...The lead's area includes his/her half of the key, plus the area inside the 3-pt. arc below the FT-line extended
I hope I'm not hallucinating