Hello, Due to an issue I had to remove my existing chimney with liner and repair my house. In the process I decided to install the new thru-wall chimney for my wood burning stove. I have researched the installation and have a few questions and need some advice. Any help would be appreciated. I have a jotul oslo 500 with 6" flue. I am installing 4' of stove pipe then turning 90 deg and going through the wall. After exiting the house the chimney needs to be 22' long. I am on the gable end and the eave extends 10" off of the house. I do not want to cut the overhang. 1. does anyone have a preference for interior stove pipe (double or single)? 2. Since I am on a budget I have considered using galavume or galvanized. What are the disadvantages to this? I think if I have to use stainless I was considering selkirk ultra-temp Are there any issues with this product? (I think the simpson duravent stainless is out of my budget) 3. Can I mix interior stove pipe manufacturer with exterior chimney pipe manufacturer? 4. Can I block out the chimney so I do not have to offset it at the overhang or should I offset the chimney at the overhang? 5. Is there an alternate reliable manufacturer that is less expensive that selkirk or simpson? There was another question that I can not remember so I might edit this. Again. Thanks for any help.