Conveyor for screw transport

i created a conveyor for screw transport in a guide rail.
The transportation of the screw works but the screw got pushed out of the guide rail after it left the feeder.
I want to transport them only at the head, so you couldn’t see the thread of the screw.
Maybe the pictures will give an impression of the problem and you have a suggestion.


Activate “RetainOffset” in properties of your path.