So I pulled my liner and took some pictures after I broke some tile to see what I got in there. Looks like they just stacked the tiles right on top of each other, I couldn't feel or see any mortar between the top few tiles. I've had one bid so far to rebuild the top, reline with Supaflue one of the two flues, replace the crown and seal the whole chimney for $4k. I suppose the other flue is similar but I just relined and insulated with perlite last summer so I don't really want to touch that side. I don't know, maybe I should just tear the whole thing down and get it done right? What would you do?