I have wanted to convert my trail bike to a single ring set up for a little bit now but deep down I know I can't afford and XX1 or X01 components and my dual ring/guide/front derailure set up works fine. I"m not sure if this would even be compatable with my bike but I wonder if it would be close to an X01 or XX1 setup but just with a ten speed. I mean as long as the cogs are the right gearing and you have a descent range, what should it matter if its 11 or 10 speed right?
http://www.nsmb.com/42-tooth-cog-10-speed-oneup/