LEGO Free Build - Star Wars TIE Advanced Prototype - Set 30275 - May 2015

Every month LEGO holds a free build where your children (ages 6 to 14) can go in and build a small set and get to take it home!  It is so kind of LEGO to do this but it works in their favour because you can't go into a LEGO store without buying anything, can you?  In our local store, the free builds usually begin at 4pm and end at 6pm or until supplies last.  A new model is available every month and is often themed to that month, like May's Star Wars TIE Advanced Prototype (set 30275).  Here's a video of the event and a turntable of the finished product, but oops, can you spot the build error, leave if me a comment of where it is thanks!