Been playing fei since sf4 vanilla and luv fei. I have no alts.
I don't know how else to prove my fei knowledge in sf4 besides playing me on xbl: SendMaster Heh, like ryu say's "The answer lies in the heart of the battle"
I have written python code to calculate frame-traps for feilong and posted in the fei forums: http://shoryuken.com/forum/index.php?threads/frame-trap-data.139124/