Hey Guys - I have read through all of the forums/web etc about the pros of installing a block off plate with an insert, esp on an exterior fireplace. I have been having a hard time finding a contractor that will install one. I found one that will install one, however he is saying its a waste and I probably will not notice a difference. This will be my second year burning and I want to maximize the stoves performance - BKAF25 insert. So my questions it: Does anyone have an experience adding a block off plate on a system that was unchanged? (same stove, liner, cap) etc after burning without one? Thx!