So I mocked the vent pipe all up. The adapter I got to go to 6" stovepipe does work, but doesnt look like its made to do what I'm doing. Think that will work fine though. But the appliance adapter is kind of frustrating... I know I'll need to attach with 3 screws but unlike the stove this is replacing I cant slip the stovepipe inside it and just run the drill through the holes since the appliance adapter goes outside of it and is also double wall. Is there some trick to marking the holes accurately? Its loose enough that it was wiggling around as I was trying to mark the second one to where I don't think the first one was lined up anymore. Just getting frustrated. I thought hooking up a pellet stove would be easier than a woodstove but its been much more fiddly and expensive than I thought lol. Hopefully I'll have her ready to go this weekend. Still got the OAK to hook up too, but going to have to piecemeal parts there too