Shortcomings? Detectable glare in the midrange and upper midrange, bit of grain in the middle hf, loss of lower midrange detail, some obvious looseness in the bass, a mild loss of treble and deep bass energy. None of these are traits of the Herron electronics, the speakers, or of the OC9ML in a different tonearm / turntable combo (RPM table / arm in particular). Don't get me wrong, the combo really sounds good - imaging and soundstage are wonderful, acoustic instrument timber is mostly spot-on, transparent. These are just subtle characteristics that can be identified with careful listening.
I've heard of using a -19 III unsprung but have not heard the results. I'm currently using it in its suspended version as designed. (I'm just getting back into audio after being away for 7 - 8 years.)
The "new" table will use an original early TNT platter and bearing with low hours on them. I particularly like that platter / bearing. There will also be a TNT stand-alone motor (NOS). The plinth will be solid, unsprung, very high-mass and lead-filled (80+ pounds). Very dead and non-resonant.