Had a go using motorcalc sheet but does not look right.

[Bob_series1]

since my design uses dual screws for the X axis cost would be my reason for using lead screws.

In the future i would also like to have a play with rack and pinion.

However, depending on the old cash flow i might be able to afford ball screws for the Y and Z axis.

Main thing for me now is to get some stuff ordered to get the project rolling.