Our house has a late-'80s vintage Majestic MST Heat-Circulating See-Through fireplace that really doesn't work very well as a wood burner for a variety of reasons. It's connected to a multi-wall metal chimney--part of the original installation, I believe. Glass doors on both sides. I notice from reading the manual that it has knock-outs for a gas connection. As it happens, there's a natural gas line running right underneath the thing in the basement, though it's never been connected from what I can see. Would it be difficult to rig this thing up for gas? Is it advisible? Can I DIY it? Finally, would it make sense from an efficiency point of view to convert to gas? I'm not looking to heat my house--just create some ambience and space heat in the living room and study from time to time. The fireplace appears to be connected to the chimney through a Vestal Multi-Opening Fireplace Damper (I've got that manual, too). Will that do gas? Thanks for any suggestions and/or advice.