I was told on reddit to share this here. I figure that it would probably be appreciated!
I managed to fit every figure from the Kickstarter into the core box. (Including the five player expansion.) My goal was to make everything fit efficiently into the original box, allow for easy access and setup and keep each figure secured snugly enough that they could eventually be painted. I believe I achieved that goal!
I will get working on that! But I can tell you that the clan trays are a tiny bit less than 3cm tall like 29mm and the width and length are the same as the original brown box the clans and small monsters came in. Same with the monster box.
And currently i just toss them in that box behind the monsters. But there is plenty of space there to bag them as well.