OK I've gone to plan B. Wanted to install a woodstove but it will project too far into my small living room. I've decided on a Quadrafire Voyager or Grand Voyager and I'm trying to find out how to get there from here. With this massive Heatilator box taking up room over the firebox and no way to anchor backer board, what am I going to have to do to prep this for Eldorado Stone? Is it doable?