If you want a Centroid, go ahead. The Haas with marposs or renishaw doesn't come with a macro routine for digitizing. You might think this is cheap, but consider all of the variables. Is what you are intending to do "Digitizing", or reverse engineering?
There is a difference in how you want to create your cad model or toolpath. I have reverse engineered turbine blades and vanes, not digitized. If I were to digitize, I would have a cad model with all of the surface imperfections the sample has (from corrosion, erosion, manufacturing techniques, etc.) Medical machining often requires these imperfections, where mold shops and "flow" type products want a nominal cad model with perfect surfaces and smooth direction changes. Moral to my story is, you need to decide what is suitable for your application, If you are just goofing around, for the fun of it, maybee you do want the Centroid.