[reckless]

if your interested check out this sight http://www.cs.toronto.edu/~apostol/arrow/
allows you to calculate arrow speed and also gives you your sight marks from 10 to 100 meters or yards.
is pretty damn accurate to boot.
have been using it for awhile now and gotta say its on the money
ENJOY...
hours of fun for all the speed freaks

 

[reckless]

put this to the top as i think some will find it helpfull.

 

[reckless]

maybe its the time difference but cmon guys your gonna love this.