Hi all, yeah, you haven't heard from me in awhile. Some months ago I got a warning from Windows Defender that this site was associated with financial malware. But at the moment I happen to be on a computer that doesn't have that kind of information.
Anyway, a few days ago a friend of mine's nephew was visiting from Budapest and my wife and I were invited to stop by for a little jam session. This nephew is a luthier that builds, among other instruments, cellos (He has a website, if interested in who he is, drop me a note). While we were playing he noticed my wolf tone on F3. I have one of those little brass ball wolf eliminators, and he was able to adjust it better than I had, so I had a little bit better, but still wolf-ish F. He suggested I get an ordinary eraser and lightly wedge it between the D and G strings, about an inch below the bridge.
I found one at home, carved it to size with a kitchen knife and, wow, a nice and smooth F! Not resonant at F, of course, but it doesn't fight me, either. I haven't noticed an effect on other notes. At some point I'll do some experimenting in a very quiet place and see if I can detect any loss of resonance on other notes, or maybe you want to try it and see if it affects overall resonance.
I used an ordinary white eraser, originally about 2 inches x 1 by 1/2 inch, but maybe for an upcoming Valentine's Day dance I'll be playing at, I'll replace it with a pink eraser, carved into a heart shape .