Modified X-ends for the Aluminatus - V3

Note: These X-ends are designed to match the lead screw nuts having triangular flanges.

This design allows the body of the lead screw nut to be inserted from the bottom allowing the x-end to rest on the top of the flange.

Revises the nut traps to be open to the top. Re-sized them to M4.
One trap had to be open to the back.

I found that the bearings aligned better if they were pressed together and centered in the part. YMMV.

For a full 3d look at the part, the .PVZ file, in the do