Lead screw T8 nut holder for MPCNC

I want to use a T8 lead screw for the my MPCNC.
Thus I need to fix the "nut" that couple with the lead screw to the central block of the MPCNC.
This design is a remix, I lowered the plane where lies the nut, added the 4 holes for the little screws that prevent the "nut" to turn and a hole for a M4 screw ortogonal to the lead screw. The M4 hole needs to be enlarged a little bit, otherwhise you can use an M3.