I just wanted to post a little shout out about Railgans "Call to help series" he does on Youtube that im sure not to many Zergs are familiar with along with alot of other great content and build orders he posts.
As an M3 Zerg who struggles vs Mech i had submitted a replay for analysis and he definitely enlightened me with alot of knowledge.
If your a Zerg player i highly suggest checking his channel out as it provides a wealth of knowledge for new and veteran Zergs alike!
Heres the video he where he responds to my replay if your also struggling vs mech