I meant to mention it earlier but boot fit has a huge effect on how well Flows work. More then any other binding. If there is nay slop in the boot then that will go right to the binding.
I really want to encourage you to try out a drastically different stance for a whole day. Something closer to 18/-15 and 22" wide. Also a great way to see what your natural stance is is to stand on your board in socks with no bindings on it with your shoulders in line with the board. Then close your eyes and do full squats (thighs parallel to the ground) As you do the squats adjust your feet (angle and width) until you feel it is as comfortable and "controlled" as possible.
2011 Smokin Buck Ferton 155
2013 Flow NX2-SE
2013 Flow Hylite boa
Burton Stagger pants/jacket