I now have only about 3h with the newly installed SH VR.
So I can't say anything about long term reliability.
But I have noticed a positive charge also at low RPM when taxiing with consumers switched on. That was not the case with the Ducati. And now I also see a nice 14.2V voltage when flying. After the flight the VR is only handwarm at most. If the attached fan is really required I can't say for sure but it definitely does not hurt. I posted some images here in this thread http://www.vansairforce.com/communit...=64145&page=31
To me going with Silent Hektik was a good choice