JFP,
Attached are some pics of my DMFW before clean-up. Would you agree that it seems in good condition? I tested based on the testing procedure you posted. The twisting results in deveation of about 10-12mm. So that is good. It is identical on both sides.
However, the FW does not go back to the original position (center) when released after twisting. Please tell me that I don't need to get another FW...

I am planning on taking the FW for balancing today. Hopefully you'll see this message and are able to respond.
Thanks!