I had a line made up for me once....... it was in the fitting on and angle and once i pulled it apart it was not even pushed up all the way to the stop...... do them yourself that way you know they are done correctly, have a play around with some AN fittings / hoses you can easily find out how they all work, same principals as cutting your garden hose and pushing it into the fitting then screwing the clamping piece over the end..... if thats hard for anyone then they need take up egg painting and bead stringing or something not carsI would get the hoses and fittings made up professionally as nothing worse then leaking lines or fittings not sealing properly due to the pressure..