I initially installed our stove using a DuraPlus Chimney and Chimney kit. At the time, I used single wall stovepipe to run from the stove to the chimney box. I don't like how the single wall looks at this point, and decided to go with double wall, DVL pipe (duravent product). I have the telescoping pipe, flue connector, and chimney box connector. My question, before I just jump in, is: how do I get the old chimney box connector out? I haven't tried, yet, and it's been long enough ago that I installed it that I don't remember how it went in. I feel like it just snapped in. Is that something I can just pull out, or am I in for way more than I initially thought? I'm somewhat handy, as I did the whole initial install myself, but don't want to break something out of ignorance. Also, I'm getting antsy, as I have not started burning yet b/c of this switch, and it frustrates me every time that furnace kicks on. Anyway, any advice would help.