Troubleshooting Hydraulic Cylinder Simulation

Hi.
I am trying to simulate a hydraulic cylinder that pivots a link.
All the components are contained in one Blueprint.
The link is connected to the rod clevis on one end, and a fixed pin on the other.
I have a hydraulic cylinder casing, a rod, a link, a pin at the pivoting end of the cylinder, a pin at the ‘ground’ end of the link, rotational physics constraints between the cylinder pin and the cylinder, the clevis and the link, as well as the link and the ground.
There is a translational constraint between the cylinder and the rod.
My simulation ALMOST works, and each component moves a little bit in the right direction, but I just need to make some tweaks.
The trouble is, I don’t know which tweaks to make!
I can send my project on request.
Any input would be appreciated.
Thanks.