My understanding is that you get the maximum allowance for the entirety of the ticket. Hence, if this is all on one e-ticket, you get the F-class allowance from beginning to end.
A few months back, I flew an award HKG-SYD-CBR-MEL-HKG in QF J except that the final segment was in F. All the segments had the F (40Kg) allowance.
This should be clear on your e-ticket.