Maybe a crazy idea but how about cutting a hole in the surround and placing a small framed window in its place.The reason for this idea is for some peace of mind if the flue pipe or some other area of the stove which you cant see starts to glow because of a possible overfireing.Free standing stove don't hide problems like a insert can.I monitor my stove with temp readings from my IR gun and magnet temp gauge next to the door,but still wonder that i may to missing something if a problem arises.