Over the long weekend, I received an email from Florian Festi (the creator of boxes.py) informing me that he’s finally found a solution to the viewbox origin issue that causes the generated SVGs to load with a Y origin of >9000 units.
Folks that have installed a local copy of boxes.py should grab the latest commit from github.
Theonline generator was updated overnight, and it now delivering beautiful SVGs that are both correctly scaled for use in the GFUI and will load into AD without the need to manually adjust the viewbox and origin settings in the file.
This was well worth waiting a year!