pilF

Ah, finally found it, had to offset the hand and position it a bit better, zero out everything and use the mirror tool. Don't forget to turn of skinning and resetting binding pose for the clone. It all works now.
 

 

Found one possible solution: export as alembic and re-import. Perhaps there's a more elegant solution.
 

This might contain some usefull information:
 
https://mographplus.gumroad.com/l/sBOdv?layout=profile
 
 
 

Updated the RS install, problems begone

I posted the quetion at Cineversity too, got an answer from Dr Sassi. For the record:
 
"My understanding is – that the joints that drive the points for PSD must be in the Driver list. With that, the resulting Joint-pose is part of the recorded PSD result.
With two joints producing pose one and then in pose two, that would result in the need for a definition of each pose, as the angle for the Shoulder changes."
 
I now have a PSD correction on the elbow with the shoulder and the forearm set as the driver and (very important) the PSD interpolation mode set to Global Strength in stead of Per Joint. "This mode will apply a deformation percentage based on the global delta variations of all the joints. All their delta values are averaged as a common strength value" the manual says.

Found a better explanation by CGDreams, i susspect something is off with the symmetrie of my mesh:
 
 

Never mind I found it, It's the time source which should be set from global to custom. Set a desired offset every n-th frame and in the f-curve menu set the nodes to stepped. Throw in some offset repeat after for more lasting result and presto. Thank you for listening c4dear cafe.
 
Philip