I think differently -- close, but different and it is hard to say n English and be half way clear.
I think what the OP did was to simply attach his center dish to the INNER side of the attach brackets welded to the rims. It was originally delivered with the narrowest configuration which had the dishes bolted to the OUTSIDE of those brackets. That is my understanding of what he said in Post #9. That move meant he did not have to roll the wheels side to side and swap tires left and right. This gives him an inch or more per side of added space between the wheels. But that is not the widest configuration. I'm fairly sure the attach brackets welded to the rims are offset and at the current time are offset from center toward the outer edge of the rims.
He could go a lot wider (4 or 5 inches per side I think) by carrying the rims/wheels to the opposite sides of the tractor and mounting them such that the welded brackets on the rims are offset to the inside, thus giving more space between wheels. Quite a few possible combinations. And those are the very same combinations available to me on my MF 2660. I purposely run mine to give me 8ft spacing outer edge to outer edge of the tires as I work on steep ground much of the time. I could run wider but that creates secondary issues with trailering, etc.