Will Ultramax fit 11 1/2" rough in?

After all the research, I got excited about getting the Toto Ultramax. I have a 11 1/2" rough in. I noticed that the Ultramax requires a 12" rough in but the diagram on the installation guide shows that the 12" rough in includes a 3/4" gap between the wall and the back of the toilet. I figured that I could get the toilet in and still have 1/4" clearence. Can anyone confirm that the 12" rough in includes the 3/4" gap?

It will fit with 11-1/4"