Jeff Kissel, Thomas Vo

Jeff pointed out to me today in light of the RH test this past weekend that the ITMY optical lever gain is a factor of 2 different than the ITMX optical lever.  We're inclined to trust the ITMX calibration because Keita made a pretty accurate measurement using the baffle PDs and the entire 4 km arm.  I also remember specifically changing ITMX &ETMX gains to match Keita's measurement, but I don't remember doing ITMY/ETMY. 

Anyway, Y-arm optical levers have to be checked once we get an arm again.