A dual direct drive setup is too heavy for the X-axis. Better try to add a second extruder driven by cable or Bowden tube. The second extruder could best be dedicated for "big nozzle infill " or printing support.
Be aware, that two nozzles are difficult to level properly. The unused nozzle will always scratch over the fresh traces and probably peel it off eventually.
There are extruders with a tilting or lifting mechanism, but I have no experience with them. (
Prometheus comes to my mind )