I bought my house with an old Ben franklin in it. Used for fun, but went through a lot of wood because of it's inefficiency. I purchased a used VC resolute, with twin doors, and broken glass. I changed out the glass, all new gaskets, had to drill out a stubborn screw, and cleaned the outside. I did a prelim burn with kindling and 1 log, for almost 2 hours. Then I put 3 logs in, got the temp up to 300 for 45 min. Closed the damper and watched the temp rise to almost 750 before I got it to cool down. I'm thinking that I didn't get a good seal on the doors and they let too much air in. Plus... I don't know what the metal flap, that's on the back of the stove is for. And the hole that on the back left side (on a spring screw) just stays closed. Any suggestions, advice, or comments, would be greatly appreciated.