CP8 dimensions

[voucht]

Hello everybody,
I'm coming again with something looking wrong to me.
I'd like to know if CP8 is supposed to cover RS14 and go alongside RS13 until the rear edge of RS10, or if it has to stop just on the rear edge of RS14 ?
If we respect the dimension on the appendix (L=240,5mm), it can only stop at the rear edge of RS14.
If it is supposed to cover RS14 and go to the rear edge of RS10 (as we can see on the picture p44 of the book), it has to be about 305mm.

Fig4-15_Page43.jpg

What is your mind about that please, and how did you guys do it ?
Thank you very much in advance for the help.