Advice on ballscrew mounts for epoxy granite rebuild

[Nealieboyee]

Hi All,
I'm rebuilding my ali extrusion moving gantry cnc router and planning to cast a solid epoxy granite base and gantry for it. The only stumbling block I've hit is the mounts for the y-axis ball screws.

As you can see in the images, the best method I can think of is to cast a plate into the epoxy granite wall on each end of the ballscrew so that I can attach the BK12 blocks. However, after casting, I would have to flatten these somehow, making sure they are parallel to the linear rails and level to each other.


Can you think of a better way?
Also, what are your thoughts on the ballscrew nut mounting. Too far below the linear rail?

Thanks
Neal