In my opinion one more dose couldn't hurt, its at this stage the plant is crying out for nutrients more than ever, Ive read alot of threads on here about flushing /not flushing and it seems about 50/50 with alot of people saying that it needs food more than ever and flushing just deprives it- stressing it out, it but then there is the arguement of taste and that it will allow the plant to get some stored nutes that have got locked, I don't really know as everything I know I have learned from RIU but Im going to feed all the way and flush for just one week so as to sit on the fence =)
Keep it up man Im stoked to see your finished produce!