My friend EJ who has been flagging for a few years did a great write-up on his experience with professional flagging at the ALMS Lime Rock race. I thought it was pretty cool to find out what really goes into flagging at that level --
http://www.onehotlap.com/2012/08/pro...coop-from.html
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'08 Z4MC, Interlagos Blue, Black int, CF trim, H&R springs, TMS camber kit w/ -3 deg, 245/275 Nitto NT01; HPDE instructor, Boston Chapter Autocross Co-chair, Boston Bimmer columnist
My site:
www.OneHotLap.com