Thanks for the responses guys. And yes, I know I need to make a habit of writing watch times down. Also, noting that the time I have available is tacho (not airswitch), I was wondering - at what RPM does the tacho time run at 1=1 hour? Obviously this would be different for different planes - but on what basis is it determined? (ie., would the LAME just set to to something like at the top of the green arc, 1 on the tacho = 1 hour of real time?)