Hey there, this is my first post here, very helpful site. Hopeing someone out there has the answer I need. I'm installing a Jotul f100 (that I bought second-hand a couple years ago) in my cabin in NH. I installed a Selkirk Metalbestos chimney last week and it went great. I'm working on hooking up the smoke pipe (single wall 24ga standard issue) The only problem I have is the collar on the stove itself is too small to accept the 6inch pipe. The pipe will fit over the collar (a little loosly) but not inside as I've always thought it should because of the flow of creosote etc. 6inch is what the stove and specs call for and the collar is too big for 5inch anyway. Collar measures 5 1/4 inside dia and 5 3/4 outside. I've been looking online for parts, pics, or others with the same problem but have found nothing. Is there an adapter I should know about? Am I just supposed to put it over the collar?? Custom make one??? Thank you in advance for all your help, I need it, its getting cold here. -J