Learning a ton from Tom and the TPC gang in this process. Big thanks to them all for keeping me in pics so I can update this thread as the build progresses.
I just posted the power steering cooler in the reply above (you see it sits right in front of the existing radiator) and the PDK cooler, which is positioned underneath the car toward the back.
In the Cayman, engine oil cooler is under the manifold and contains the connections for power steering cooling. The better the oil cooling, the less heat gets transferred to engine coolant. Cool
Third pic shows the stock oil cooler and the TPC motorsports solution. Notice the stock oil cooler w/ PS cooling is 55mm tall and carries the power steering connections.
Then the Motorsport oil cooler w/o PS cooling is 63mm tall.
Next one, interestingly, the Cayman GT4 Clubsport uses the same width oil cooler, without PS connections - but it's only 43mm tall!
Also of note, the GT4 CS uses soft rubber engine mounts...