I don’t really use any part of Coach Winter’s system. To me it’s a just a reference as to how some great athletes were produced. By rep at least some of what the Jamaicans do is based on this system and Charlie said the approach had merit.
Having said this, Winter’s interpretation of proper sprint mechanics and how to train them is totally off the mark.
I’m not sure which edition of the book that you managed to acquire, but there are significant differences between the two. The first edition training schedules have places reserved in training for “strengthening exercises” but they are only present in the month of February.