Hi deal-blind,
You’re very welcome!
I have set up the Spline with more points (Uniform 128), then used the Current State to Object. This Spline is the new one to use in the Follow Spline.
Take from the Object Manager.Tags> Others Tag > Vertex Map, while the new spline is selected. Shift Double Click on the new tag to get the Brush option in the Attributes. Paint the values to your speed needs.
The screen shot is manipulated to show the weight painted on the Spline more clearly
Screenshot 2025-12-18 at 11.55.55 AM.jpg
More in detail
https://help.maxon.net/c4d/2026/en-us/Default.htm#html/OFPFOLLOWSPLINE-FP_FOLLOWSPLINE_OBJECT_GROUP.html#FP_FOLLOWSPLINE_OBJECT_FOLLOW_STRENGTH_MAP
There is no option for single clones to adjust each and every clone separately. If needed, the driving Practice or Particles need to move into a new Group.
Cheers