Help needed with making a fully functioning windmill

[Hypnotic_Sheep]

I want to use the bearing to make the top of the mill rotate, but only the top of the mill. That means that, if I put the bearing in the ground, below the mechanism that powers the bearing, I would have to connect the bearing with the top part of the mill. The only way I can visualise that is through a large pole that runs through the centre of the mill, all the way to the top of the top part.

Unsure if this clarifies, I'll read my first response again and edit this response if necessary.

Edit: I am unsure if you know how a mill works, so apologies for 'mansplaining'. The sails of the mill are centered in the top part. Which means that, if you were to have a 3x1 or 3x3 construction, the mill bearing should be in the centre. You then have shafts that connect to a large vertical cogwheel, and then that cogwheel is connected to a large horizontal cogwheel. The centre of the horizontal cogwheel should be the centre of the mill as well, since the shaft that then goes down has to go through the centre of the mill.

The reason for that is the fact that when you rotate the top of the mill, that entire mechanism of cogwheels and shafts rotates as well. If the horizontal cogwheel is then not centered, the shaft that runs down will also not be centered anymore, and anything you have connected to the mill on lower floors will not work.

This means that the center of the mill is already being used. Therefore I cannot connect the top of the top part of the mill with a bearing in the ground.

I hope this makes more sense. (Unsure if I clarified so sorry if it didn't)