I think Jacks planes are noteable for their lack of supuflous components and purity (simplicity ?) of line,
which gets them in the correct wing loading ballpark .Despite some people whingeing about lack of complexity in some drawings.
If you rip into them , most of the construction is self evedent , unless your prone to worrying and like to see 10 paces ahead .
C/L stunt , F.M. Mar 96 . "I was begining to see how they built their models without plans ,They just laid out the I beam centreline,Tail & Nose moments on the sheet Balsa sides,
Then drew the Airfoiul on the side to locate the wing leading and trailing edges,
A rough pencil sketch of the basic dimensions and shapes would suffice for the rest of the plane ".
Try this sometime when youre in a creative dispoition . You might even enjoy it .