I just want to confirm I understand info from the first post. I will be in MK the 3rd and the 7th of Dec. Due to FP+ reservations I strongly prefer the 7th but don't want to miss out entirely (and the 7th makes me nervous cause it's a party day). So, can I book the 3rd to be safe 27 days out, wait 4 days, and book the 7th (automatically canceling the 3rd) should it be available? Does replacing a day(if available) generally work or should I go for the 7th only?