Can you explain the rational behind those standard deviation numbers? What sort of probability is that? Also how do you get from probability percentages to standard deviations and back in the first place. (I like math, but I suck at statistics, so it's still magic to me)
While my Italian is even worse than my 'statistic', it would have been nice if you could have provided a link to that forum. Maybe it is public enough to get a peek inside on that method. And let Google Translator have a go at it. Could be fun.
Still, only with relative target bearing between 75 and 85, and speeds between 6 and 7 , or target needing to be between 5 and 7, seems to be quite limiting in use to me. Such narrow bounds.