^^ My deadline for sending in submissions for remarking is the 7th of September, so yours I'm assuming is around the same. Seeing as it is important, I'd advise sending 2 papers off for priority marking and hope they get back before your deadline. If they don't budge, it's probably not worth wasting money on getting the other 2 remarked, as that'd be a significant number of points that you're looking for, and the chances are you just won't get them.