GPP for 400m runnres

Yes, I understand. But the Charlie GPP model here is overal for sprinter 60-400? Or was build for 60-100m sprinters? I didn’t understand if that concept was for all sprinters and than during SPP the short and long sprinters split and started their SPP? However, SPP here was 12 weeks long, my SPP is max 4,5 weeks long…

The longest run in Charlie’s GPP program except tempo work was 60m… still enough?