I understand that! I wont purchase anything unless I have some sort of info as to the capabilities of what I am spending my money on. What is the minimum and max thrust out put? all units are not the same, no matter the size, It appears this info should follow some sort of standard. The manufactures seem to use a haphazard set of parameters to sell their units and I have to rely on others to find out what a particular unit can do. I don't want to experiment and spend my money to get info the manuf. should supply.