Blindjim, A long posting to answer your question about how to begin with Herbie's is missing in action. A short version: If you go with the starter teflon ring type for smaller, cooler tubes, and the metal ring type for larger, hotter type tubes, you will get a painless (monetarily, and physically) introduction to tube damping, and probably just stop there. Remember, ninety day home trial. Wow!
Also, the simpler footers, selected for component weight, and size, make an even greater, overall sonic improvement in "everything you didn't realize is missing in your system" at very modest cost.
Please email through the Audiogon email system so I can answer more easily any questions (perhaps, by phone) arising as you make your choices while communicating with Steve, at "Herbie's".
You may want to get that initial feel for what kind of satisfying changes you hear with the basic items, as I did, before thinking about the more expensive part of the product line. Like your previous experience with different species of wood, there is an excess of choices for restless ears to try.