May 23, 2016 ITMX dead He/Ne laser sn P845648 replaced after 1062 days [2.9 yrs] by 1103P, sn P859884, with output 2.6 mW, nicely round beam quality at 15 meters.
Power just before viewport 1 mW, returning light on qpd 154 microW = 7,500 counts