They typically will increase it 10% at a time. It can take up to a year to get it tweaked just right. I found they would adjust it, and it would be fine, then the tone would creep up. Readjust, repeat. It took several months to get it where it is now.

Keep in mind when increasing it, you don;t want NO tone, you just want the tone decreased to the point that you can work with it.

I think 190 is still pretty low, so you have a big window to work with.

Good luck.