Nah - I was really wondering. If people ask this is not much use :I hate you...
I missed the post already mentioning it... Like you never, ever miss anything written when not really paying attention anyway
"When will they take the snapshot"
"Well, when Phase 4 starts it is too late"
Whereas:
"When will they take the snapshot"
"After phase 3"
is useful
ofc if they take it 'during phase 3' then this is also 'before phase 4', so they aren't the same
(For once I wasn't being sarcastic & get told off - back to 100% sarcasm it is )