Went up and dug around some of the cracks on the crown this afternoon to see how hard the concrete was. Pretty solid. But after scraping the caulk from the flue joint, the concrete was still damp and moldy, and it revealed there is no real expansion joint, maybe 1/16" gap at most. Both flue tiles have minor vertical cracks on all 4 sides, and wondering if they would last another 20 years along with whatever we decide to do. My wife almost had me convinced to go the chase cover route, but after seeing that, wonder if it would be the better to go ahead and demo the old crown, get rid of the dummy flue tile, replace the other tile and then pour a crown? Or if the tiles still have a lot of life left, cut the dummy down flush with the rest of the crown and then cover with the SS chase cover and extending the collar all the way to the top of the flue tile as Rockford suggests for that application? Either way, I think for time sake, I will contract the re-pointing. Total chimney is roughly 74 sq ft, but the quotes are only for joints that have been caulked or have larger shrinkage cracks. Estimates for repointing range from $660 to $782 to $987. Everything is line itemed, but not sure how any of them would respond to just doing the re-pointing.