Back on my 5 stars..., mounting are not enough high! I had a clash with the nextruder during a Z calibration!
I did a mirror to get symetrical mounts.
I proposed a remix: https://www.printables.com/fr/model/1003298-mk4-filament-guide (edited)

Back on my 5 stars..., mounting are not enough high! I had a clash with the nextruder during a Z calibration!
I did a mirror to get symetrical mounts.
I proposed a remix: https://www.printables.com/fr/model/1003298-mk4-filament-guide (edited)
@Oggie_44246, yes, I conrfim than my remix is ok with the MK4 Z max during printing or calibration.
@Rom1_2045563 excellent. I printed the arms from your remix, and they seem to work great. Thanks!
@SemiPolaron
Thanks. If you turn the bridge by 180°, the position of the holders are symmetrical (the right mounting hole on your picture has an offset by 8mm to have 2 identical parts, that can be printed without support).