Hello @abgregs,
Thanks for updating the thread.
I have tested the code shared by my colleague @paul.r and on my local setup it’ working absolutely fine to have a full width page in tag archive. Here is a screencast that I have recorded:
Please setup the code as shown in the screencast and make sure to clear all caches when updating so that the code from the latest release is always in use. This will help you to avoid any potential errors.
That being said, please note that and as you can see that having fullwidth layout for tag archive page require custom development. While it’s outside the scope of support but my colleague went above and beyond to help you get the desired layout. However, providing support for custom codes (like PHP changes) falls outside the scope of support we can offer. In case of any issues with the layout because of custom codes we won’t be able to provide support. Beyond this it will be difficult for us to help you on this customization request.
Thanks for understanding.