Andy,
What did you have under your Classic prior to using the terrastone plinth? Did you ever try a maple block? I did replace the stock feet with the Edensound Bearpaws, which worked out great, but I also have my Classic on a 3-inch maple block. I wonder whether replacing the Bearpaws with the terrastone footers would render an improvement, and then whether the terrastone plinth would make sense in conjunction with the maple block.
What did you have under your Classic prior to using the terrastone plinth? Did you ever try a maple block? I did replace the stock feet with the Edensound Bearpaws, which worked out great, but I also have my Classic on a 3-inch maple block. I wonder whether replacing the Bearpaws with the terrastone footers would render an improvement, and then whether the terrastone plinth would make sense in conjunction with the maple block.