Any Sleep number bed owners here?

We have had ours for a few ears now. Love everything about it except for getting the two seperate mattresses. Thought it would be a good idea to be able to adjust the head and foot seperate from my wife if need be. Issue is they push apart in the middle.
While I don't have a split mattress, my parents had a split adjustable bed. Solved the problem with a King size heavy mattress cover and used aa fitted King sheet. That kep't the matress from seperating and didn't intefere with the adjustability, at least to the amount they moved the head or foot.