So I have a flash forge creator pro and when tightening/ replacing the extruder head I broke it off inside the block. Before you ask yes I did preheat the block before I tried to change the head. My question is this does anyone know what size easy out I would need to get to remove the remaining bits that are still stuck inside? I really don't want to replace the whole assembly because of a boneheaded mistake.

Thanks in advance,
Syden