Hi Andre, also here is another illustration of how the profiles will be rotated as they travel along the rail curve, if this helps to explain why you are getting that bunched up result:





So if a profile sticks out too large of a distance away from the rail it's going to make the profiles criss-cross over each other:



In order to avoid bunching up the profiles need to extend no further than something like this length away from your rail curve:



- Michael