After a long week of curing at stable temps in the bubble, we removed the roof scaf and got everything ready for the next phase in the spring: cornice, box gutters, and (new) salvaged slate roof.
The new chimney looks a lot better than it did before and has the right mortar now.
One of the benefits of doing the project in proper steps: we get to trash the existing roof before tear-off and dry in while doing the masonry. This would be incredibly complicated and costly to do later, after the new roof is in. If you are getting a permanent roof installed, and have chimneys. Always complete the chimneys first while the original roofing is in place.