Everything gets a little more liquid with time. But I would expect that by 10 hours you got what you got. If you can't hear VTA then for sure you're not gonna hear whatever slight changes the next 50 hours brings.
How are you changing VTA, and by how much at a time? Because you should be able to hear even microscopically tiny changes, I'm talking very small fractions of a millimeter. If you're not hearing that, pay attention to the balance between attack and fundamentals. Too high and there's more attack, a sharper faster sound, too low and its a bit bloated and you're losing a small amount of detail. Dialed in is perfect.
Then once you get this what you do next depends on by just how much your highs are too, uh, high. Loading it down (lower value cartridge resistor) might be the answer you are looking for. There is no right answer you just try a few values and see. When it sounds right to you, its right.
How are you changing VTA, and by how much at a time? Because you should be able to hear even microscopically tiny changes, I'm talking very small fractions of a millimeter. If you're not hearing that, pay attention to the balance between attack and fundamentals. Too high and there's more attack, a sharper faster sound, too low and its a bit bloated and you're losing a small amount of detail. Dialed in is perfect.
Then once you get this what you do next depends on by just how much your highs are too, uh, high. Loading it down (lower value cartridge resistor) might be the answer you are looking for. There is no right answer you just try a few values and see. When it sounds right to you, its right.