If you dont understand the drawings, it might be safer if you bought the trigger from one of the manufacturers that sell them seperatly such as Aimrite, Riffe, Totemsub or Abellan. They arent all that expensive and they are safer than not knowing what you are doing (like me
I'm total crap)
Have a look as well for posts by Persiko, he has a link to his website with some pretty clear instructions on how to make one, only in Italian but hey you're from New York
