A904 with new driveshaft

Does the factory interfere?
If the factory nut is difficult to get on once it is on does it interfere, full droop, full compression of the suspension?
As for other nuts does the factory have a locking feature? Lock washer?
Personally I don't see any reason not to use an alternate nut. Most of the forces are shear on the studs. Maybe a nylock?
The factory nut does fit and does not interfere, it just has unused threads!
The factory has a lock-washer. I'd probably do the same.
Thanks,Joe