Talk:Cerulean Core/@comment-95.89.120.53-20130408200954/@comment-4576875-20130408220418

The drop rate for a c-core from a c-box is closer like 1:5, 1:100 for the c-rack, 1:6 for Builders Box and 1:3 for c-core from Builders box, 1:3 for zoot token from Builders box.

Sounds like your maths adds up though, unless you want to guarantee getting the c-core.