Great responses. Thanks to everyone. I have the HW 19 MK IV which utilized a black acrylic arm board with the metal sub-plinth. Plinth and arm board are the same thickness. I also have what I think was the original TNT platter (black, lead filled with cork underside.) The thickness of the platter relative to the height of the post is what causes the problem.
Seems like nicest fix would be the thicker arm board VPI once offered but is no longer available. There is a place near me here in deep rural that works in acrylic that I can get to make me a new, thicker arm board. It would raise the post relative to the platter. Next choice is the aluminum base Bruce offers if it is thick enough. Since my arm board is acrylic there is currently no base installed. I'm also intrigued by Chris's idea of longer leveling spikes.
I'm going to touch base with Bruce to see what he suggests. Genius that he is he may have a simple fix.
The issue is not critical. I am near the upper limit of VTA adjustability but have a little (very little) room left. It limits ability to experiment.
I'll report back.
Thanks again for all the helpful suggestions,
Harry
Seems like nicest fix would be the thicker arm board VPI once offered but is no longer available. There is a place near me here in deep rural that works in acrylic that I can get to make me a new, thicker arm board. It would raise the post relative to the platter. Next choice is the aluminum base Bruce offers if it is thick enough. Since my arm board is acrylic there is currently no base installed. I'm also intrigued by Chris's idea of longer leveling spikes.
I'm going to touch base with Bruce to see what he suggests. Genius that he is he may have a simple fix.
The issue is not critical. I am near the upper limit of VTA adjustability but have a little (very little) room left. It limits ability to experiment.
I'll report back.
Thanks again for all the helpful suggestions,
Harry