Like Hughes mentioned, I have a single catch can that is divided in the middle, making it actually 2 catch cans in one. Here's the best picture I have of mine. Basically like your setup, but with a catch can on the Inlet, and no check valve there. Only 1 cheap check valve which is located where you have the other one, betweent the IM and the Catch Can.
Or you can also kinda see it towards the end of this video.
http://www.youtube.com/watch?v=FoNOh750GHU