Wrong, the first version MK-IV Platter is a 16 lb affair, I know, I got one. And as I understand it, the later version of the MK-IV/TNT Platter, with Lead Ring was 18, or 20 lbs.
Then there's the Super Platter, which for the HW-19, and all other Tables other than the HR-X, was 25 lbs.
The HR-X Super Platter, at 30 lbs could probably have been retrofitted somehow to the HW-19. Probably a little bit of machinist work is all, to make such fit.
There's a lot of empty space under a HW-19.
I could probably contact Galibier, and have them send me a 42 lb Stelvio Platter, and I could make it fit. Problem is, how much does a person wish to invest?
As I have found, the Platter is a huge influence to the sound. Any Scout, Scoutmaster, and Classic Platter will fit the HW-19.
One could buy the Junior model, and take it from there.
That's what I did. My modded HW-19 weighs more than the Classic, and probably sounds every bit as good, if not better. And it didn;t cost as much. Mark