WE DID IT!! We unlocked all the Lil' Harpies! YAAAAY.
I've added the Harpy Eagle as an add-on choice, and now that we've unlocked all the designs, I put up a full set pledge tier. If you want to collect them all, you can back that one--or, if you've been collecting them through add-ons, continue on, it'll all be the same price!
So now what? We've unlocked all the stretch goals, and there's 4 days left to the campaign. So: not much!! However, there is something else that might be of interest, if we can reach 7k before the end...