I have an early Rev L TIU which I imagine was made before any TVS revisions, but I have never looked to be sure. Like Junior, I have no way to check the outputs nor would I know how to if I did have the equipment. My DCS system is still working just fine with no noticeable problems that I can see, so I will continue using it, follow this thread and hope for the best before it breaks. This is a very interesting discovery you all are discussing here!
Also, I really appreciate the work you all are doing here, even though its still over my head. I still like following along. It's great to have folks here that actually understand this stuff. Thanks again to all of you for your work and all the time you have been putting in on this!!