T/C Seneca Lock Disassembly

[kencolamarino]

Can anyone tell me how to disassemble a Seneca lock? Specifically how to remove the mainspring. The mainspring guide is attached to the tumbler so I can't figure it out. It isn't removed like a T/C hawken lock. Everything else looks pretty straight forward. I rather ask than remove the bolster screws and start messing around with it, although it looks like that's the way you do it.