Hi Karsten
I can not open your avi files ...patience.......-
Is true that there are a lot of Node,
it is true that some mathematical expressions
they could be more synthetic and that some outputs, could be eliminated
but I have deliberately left them reads as for better
understanding the functioning....
On the other hand being able to use only functions
trigonometric, I could not do better ,moreover dominate the whole movement with a single slider
it's not easy -
However, I believe that the introduction of Nodes
focused on " Vectors " can greatly improve
these operations...
Or a system that providing for the imposition
"Constraints "can be edited between geometric elements
(see Catia Kinematics, Grasshopper Kangaroo and Other ....)
best
al

Ps-Always at your disposal