He - We have an arrow insert purchased a few years ago but never connected. I replaced a bay front insert that came out too far from the fireplace and as you can see - this one is flat. The 6" liner is still in the fireplace and I thought it a no brainer to hook this one up when the time was ready. The problem is that the new (used) insert has an oval chimney pipe connector and I can't find an adaptor to go from that to a 6" round flex chimney pipe. Anyone know where I can find the connector? Thanks in advance!