I tried to have that done when I had both bathrooms remodeled, I really did. Apparently, that’s just not something that’s done in residential plumbing, unless you are some kind of mutant. 
But things just spiraled out of my control. That’s on the list of “things what can use improvement when time and funds permit” for me.
If that.
I’ll also state for the record that the system that American Standard uses on their Champion series toilets is… very finicky and does not like being adjusted at all, especially if you’ve had to replace the sealing ring on it because the one that came with the tank was defective and started leaking after a year. 
(When I get it to properly flush though, it’s fantastic.)
