How 'bout a decompression theory thread? (OC Deco gases with helium)

[Corndogg]

Alright, so I usually do 200ft OC dives on 18/45 with 20 to 30 minute bottom times then ride an explorer up using 36 and 80, sometimes 100 if the boat has it.  I'm working my way deeper and have been told I need to start using helium in my deco mixes.  Sounds good, just wanted to start a huge thread and see what everybody else is doing and why. This means you divbum    Readyyyyy............GO!