Similar....i've been toying with the PHY KM30 in a birch ply semi-open baffle (see PHY site for plans) with very good results. BIG, warm, lush, tonally correct, detailed but not in-your-face, and engaging. Having a great time with 2A3 & 300B.
Good luck and post back and let us know how you make out.
Mike
Good luck and post back and let us know how you make out.
Mike