Gee that's amazing. I never thought it was possible to make a visual of a shadow on the planet face without some fancy technology to help...
You have a 6inch mirror (?) I only have a 4 inch mirror. That extra 2inches of aperture must really increase the magnification(?)
I might have a look tonight myself and see if I can see anything. I remember a number of months ago how I was able to get a distorted image of what I thought was one of the closer moons to Jupiters surface. But as far as I know that is about as good as it gets when it comes to glimpsing near objects on the planets surface with a 4 inch telescope.
So yeah, I'm gonna have a look out for that now. I'd just be happy to capture it on a time exposure. I think it would be amazing to look at.