I know a few of you use http://mining.thegenesisblock.com/ to estimate your return.   They had a bug in their system.  I contacted them yesterday morning and it was fixed last night.  I recommend revisiting the site.

September units still look good but October is pushing it.   Any delays after October will cause the units to not break even.  Getting the miner online the minute it's ready will be crucial.  Shipping/customs delays will be a killer.   Just to be safe, I'm signing up to host one of my units.

I can't imagine KNC shipping units that are not profitable so I really hope their 'margins on margins' work out. 

This is going to be a nail bitter for many all of us.