Try putting the 16.5 on a large folded towel. If that works, you might want to try a couple of gardening knee cushions . . . not the ones you attach to your legs, but the rectangular pads with an oblong hole on one side, like these:
http://lawn-and-garden.hardwarestore.com/82-518-garden-knee-pads-and-seats.aspx
You can usually find them at any store that has a gardening section, like Home Depot.
Neither will make the machine whisper quiet, but ought to tone it down a bit and make it somewhat tolerable.
http://lawn-and-garden.hardwarestore.com/82-518-garden-knee-pads-and-seats.aspx
You can usually find them at any store that has a gardening section, like Home Depot.
Neither will make the machine whisper quiet, but ought to tone it down a bit and make it somewhat tolerable.