Again, it is not wrong, and not even rough if you consider that the goal of the book was not for people to draw the chassis on a CAD software. It was for people to build the car in their garage, and in this respect, the data's of book are good enough.
As I said, the check dimensions are correct for drawing the layout on the table. The cut angles are correct to cut the tubes, because who, building the chassis in his garage with the tools we usually use for that, can make the difference between a 15.667° angle and a 16° angle on a 25mm section?
Wanting to make a CAD model with the book's data is just going beyond what it has been written for, so the book (which can be blamed for other things
), can not be blamed for not giving us this accuracy. We need to figured out by ourselves !
Just my opinion, of course...
