Sorry you busted out on this. We have the large insert new this year and really like it so far. Hope you can fix the chimney issue. Maybe a tile breaker from the top down?
I looked up tile breakers a bit. I need to go through cinder blocks not sure if it would be long enough, and from that point up is like a solid 20' so I'm not sure if there would be too much torque on it. Also don't they usually break clay tiles? Strong enough? I'm having another stone/ brick union mason come out hopefully this week to look at it. The stove shop basically is ready to refund my deposit and I'm just totally bummed out...
After that I plan to try to find a local chimney sweep that is experienced take a look. I also had another stove shop from the other end of town come out and give an estimate on a Hearthstone Clydesdale - and he said no go based on the smoke chamber tile issue.