I've been wanting something like this for a long time, thank you so much for the work.
I've actually been thinking of maybe extending this, i'm a developer and just looking at the XML files it wouldn't be too much hassle to basically create a custom file, could easily add sliders for the other properties and just export the whole file.
One could also import an existing file and just change it easy without having to manually change each property.
I don't know if its anything people want but it would be possible atleast.