Correct. The "detail" is unfortunately in the 2-part construction series for the "5" jet which appeared in RCM; design background in Pt 1, actual construction in Pt 2. The construction detail in the 2nd article is the foundation for construction of the "7".
Anybody wanting these articles in Adobe PDF can email me direct - beware, Pt 1 is ~700K, Pt 2 is ~1M.

Mike