I was wondering what size base the screaming bell and the plague furnace ride on. My friend is doing some test runs with skaven before he decides to start the army. We were wondering what size base these 2 models sit on. At first we thought it was a chariot base, but the book mentions it displacing 15 models which a chariot base does not. Do these models have their own special base size? or is the unit doomed to fit together like a bad tetris game?