Pairs well with BulletZ, so that hitscanners turn into projectile enemies, just like the enemies with guns in MMZ.
Seems to break the weapon steal function though.
Speaking of which, I'd recommend adding a "discard weapon" hotkey, to throw the empty z-knuckle-stolen weapon at enemies, like how you could press select (iirc?) in MMZ and throw the weapon back at enemies when you were done.
I'll make sure to add knuckle compatibility to BulletZ in the future. In the meantime you could use NoMoreHitscans, which should be fully compatible with MMZDoom.
You can also throw Zero Knuckle weapons by holding left+right and attacking with the knuckle. It's not perfect, but I don't feel comfortable making a whole button for a weapon you might not even have for a long time.