Ok, so I thought I had this all thought out and ready to go, but it turns out I was wrong. Background: I have a Lopi Republic 1750i ZC approved insert to install in a ZC fireplace. I purchased SS flex liner with all the required adapters as well as insulation. Problem: I laid everything out yesterday and was doing the final planning for the install and I came across the problem of attaching the 13x13 square top plate to the 11 inch circular metal chimney. So I called the company that I purchased the pipe from and they said that there is no solution for what I'm trying to do and that I can return what I purchased but there isn't anything I can buy to complete this install. Then I called the dealer that I bought the stove from and he said there shouldn't be a problem. The guy from the pipe company said the issue is the fact that you have to take the existing rain cap off which causes the system as a whole to lose its UL rating The Lopi dealer says he will come and install the stove with no reservations. I asked what the charge would be if he ordered the pipe, fittings, and insulation as well and he said the cost of materials plus install would be $1500 plus freight. The pipe company will not pay for return shipping and I imagine that the cost to ship this stuff will not be cheap. Is there any way to correctly use what I have or do I have to eat the cost of shipping materials back and purchasing new materials plus the dealer install? I REALLY appreciate any help as I'm unbelievably frustrated at this point.