I am looking at Monday being the soonest I can make Fire Pandas. I need 14 stones to upgrade to level 5. That's 28 hours (if I don't miss any stone collections) for gathering 6+ hammers (I've gotten 1 from my mines so far) for the first FP. So I will probably have all three fire pandas on late Tuesday but I already know I will only have 2 chances to collect anything on Wednesday. Time to do some serious math to decide if I continue.