Have an existing block off plate for my nc30 with an attsached 30 degree elbow i belive above it. I did this to get my liner as close to lintel as possible and to get this hog out on to the hearth. Were now looking at the osburn 2400i for a cleaner finished look but still offeres the heating capability of thr nc30. Will the existing block plate pose any trouble? Does the surround for the osburn 2400 mount directly to the stove(didnt look like it did from manual) plan to pull the 2400i out onto the hearth useing the existing liner and block plate just trying to prepare. Also planning on stuffing some left over roxul batts behind and beside the insert before installing the surround shroud. I dont forsee any fibers making their way out from the blower. The blower should be a sealed jacket around the insert and not pulling those small fibers out hope?