Very nicely done! And it's interesting to read how the system has evolved over the past few years. I see that much of the discussion has focused on acoustical matters. Perhaps at this point the way to address the remaining issue that has been mentioned, involving the highs and "air," would be via tube-rolling, cartridge loading, etc., rather than placement and acoustics. Just a thought, which perhaps you've already considered.
Enjoy!
Best regards,
-- Al
