Make sure when you tighten your stuff down, you use the right tools. I was almost caught with my fly down when i tried to tighten my lockring with something other than a lockring wrench. Hard riding (forward) followed by gradually coasting to a stop should put ample torque on your cog so that you will not need a chain whip. However, make sure that the lockring is on tightly. If you don't have the right tool (I have the Hozan lockring wrench), go to someone who has one or buy one somewhere... you will f*** up your hub otherwise.