I had a tech come out yesterday and he replaced my HR44 with an HS17 and put a C61K on my one 4K TV. However, he left the old C31s on my regular TVs, even though they were all supposed to be replaced. I was here and should have been paying more attention, but thought I would check everything before I signed paperwork, but he never asked me to sign anything. When I noticed they weren't replaced, he had already left. In any event, I contacted customer service and they are going to have a tech come out tomorrow to replace the three C31s. However, she insisted on them being C61Ks, even though it's highly unlikely I'll switch two of the three TVs to 4K in the near future. So my question is... is there any reason not to use a C61K on a regular TV? In googling, I saw some older messages referencing "nag screens," saying you aren't getting 4K. TV. Are those still a thing and, if so, how annoying are they?