I think I read somewhere around here that 10 pumps of the letro from ARR equals 1 ml and 2.5 mg. So if my math is correct and 10 pumps does indeed equal 1 ml then 1 pump equals .25 mg. My question is has anyone ever tested the accuracy of this pump (ie pumped the bottle 10 x into a syringe or something.)? Just curious as to the accuracy of the pump. Thanks