Web Control: home g code modification; HOW TO?

hello there,
It seems to me that I post weird question here:

I want to implement photo sensor for my Z-MIN-Endstop
the sensor is going to be installed on the X-carriage, therefore, I would need the Z home to be moved from x0y0 to
say X105 y105, in the middle of my print bed.
would it be possible to change anything within Astroprint at my end, so when I hit HOME, it would do X0 Y0 and then move to the desired position and then do z0?

Thanks for your help.

Robert

We don’t have a way to modify the gcode that the control screen buttons send.