I love Putnam, a personal favorite. Putnam eats tires though. Personally I'd replace them, 60% isnt much and that is still a month away youll be needing new tires after that day anyway. You're a good rider and will likely get bumped to Intermediate too. Get a set of Q3 for that day and then your mind wont be holding you back because youll be on tires fully capable of Advanced pace that will still have a couple thousand street miles in them after that day.
Just my 2 pennies