Apparently OptisanUSA in LaCrosse,Wisc. has gone awol. Their phone is full, FB page inactive for 2yrs and no email. While helping Randy with his ordeal i called Trenier(really nice folks,btw) and was told that their last contact with them was in the Feb-Mar('17) timeframe. He said to try contacting Optisan.eu to see if they could possibly help. This is really a brutal deal for not only RS but for other Optisan owners as well.