@maletecsci i think it may be enough to set up the same driver as E and U, so something like
M584 X0 Y1 Z2 E3 U3 P3 with the U axis settings matching the E settings in the rest of the driver settings
That will hide the U axis by default.
Then in your homing file at the beginning, set M584 P4. That will unhide the U axis, allowing you to home it using G1 H1 Ux etc.
Then just rehide the U axis at the end M584 P3