I should know the answer to this question already. However, I am having a "senior" moment!
I don't remember which update was on my 1DX when it arrived (1.0.3 or 1.0.6) before I installed version 1.1.1.
I am thinking that 1.1.1 should include all previous firmware editions? Am I wrong, or do I need to install 1.0.3, if that is even possible?