To run and work faster then used to be.
And sometimes I think that Windows (with BootCamp) is not fast as MAC works.
I order "Mac Mini Dual Hard Drive Kit" from ifixit.com and just follow the directions.
The tool of "Mac Mini Dual Hard Drive Kit" is enough.
And the direction of ifixit.com is enough also. But one thing to add on to remove logic board from MAC mini, you should insert logic board remover straight and pull your side.