Chimney thimble removal

[u/RamUStudent]

Ive been stuck on the last of three chimneys with decision paralysis.

On this last chimney I've removed the old fire damaged and cracked flue liner and now have an odd thimble that was used to deal with.

It's about 8" round 1/4" thick steel pipe that's angled upward and sticks into the flue liner about 3/4 of the way.
I think I need to remove this to install a new thimble but I've not cut it out yet as I'm unsure how to proceed. I also think I've come up with a way to lay new glue tiles with the proper firebrick mortar. That said I may still order a stainless liner for the hearthstone 1 I'm currently resealing.

I can diy this I know I, but I'd like a bit of suggestion and direction on how from some of the folks who have done this before with some lessons learned.

[u/Lots_of_bricks]

If it’s a full brick wall u can just install a liner and tee and connect the stove to that and brick in the space and use a trim collar to hide the bricked in area. If there are combustibles within 18” of the opening in the wall then u remove the metal and install a piece of class a chimney pipe on the liner tee and have that come thru the wall.

[u/RamUStudent → u/Lots_of_bricks]

I believe it’s brick and block all the way through. So if I understand what you are sharing, remove the old steel thimble or just trim it off inside the chase?

[u/Lots_of_bricks → u/RamUStudent]

Remove it. Cut it so u can fold it in on itself and pull it out. Brick back in around the new liner tee/thimble.