After replacing the ETMY HWS plate last week (alog 64287), this morning I took new HWS ETMY references with ALS shuttered and HWS camera at 20Hz. EY ring heater is on at 1W/segment. Sadly the ITMY retro-reflection is still getting back to the EY camera. See images with and without ITMY aligned. More work will need to be done to get rid of this refelction.