I stumbled onto this article and I had to try it. A guy built an adapter that goes over the fan on ender 3 pro and cr10 and a few others that have this Configuration!
I designed and printed a mount for a dial indicator for my 3D printer.
It made a world of difference when trying to level the bed.
It pointed out the warp of the bed that had to be fixed by removing the bed and bending.
Of course, just leveling the bed was made easier as well.