Does anyone know if it is possible to use two different types of Sony glasses at the same time since they are all IR based? Like for example, one person has the 750, and another person the 250 model, or one person the 750 and another the Playstation 3D glasses (which do say Universally compatible with Sony TVs). The reason I ask is because my wife has some issue where the 750 model slips off her nose and she is bothered by the thick black plastic in the middle. Might need a solution as it would royally suck to have to return an otherwise excellent TV and get an inferior Samsung because she doesn't have a problem with those glasses. And I can't use Samsung glasses on the Sony, because Samsung uses RF, not IR.