oh yeah, i figured it out, its in ft, and lbs, so thats good, it has two sides. the nm, when ever your at 50, and set the nm on 10, it takes away 10 so makes it on the torque of 40lbs. cause everytime i set it on 50 and 10nm, it always drops down to 40, same with 30, i take away 10 and it sets it on 20, and i can set it on 22lbs as well, which is very good, and i figured it out, so its all good now, ill be having it run on pump gas tomorrow hopefully, BTW do i have to change the o-rings in the head? cause i dont have a set, but ill be using the same o-rings if their still good.