Hello Jim,
I am taking, among other things, Pramipexole retard (Sifrol) once a day, which I believe is the same thing. Still for the non retard version I see in the IfU that the lowest noticeable dosis is 0,264 and the standard dosis is 1,11, whereas the maximal dosis is 3,3.
For my i.e. the retard (slow release) version the dosage is 0,26 0,52 1,05 1,57 2,1 2,62 and 3,15 so you seem to be closer to the maximum.
I used to take the mid-size dosis of my pramipexole of 1,57, but I‘ve been told that this is too much for somebody a year after diagnosis (I was diagnosed at the age of 44), so I went back to the smaller dosis of 1,05, and I didn‘t feel well with it. Instead of going back I took one other additional medicine (amantadine) which helped me to go back to a good state of health while keeping the pramipexole level at 1,05.
The reason not to increase pramipexole quickly was (according to my neurologist) the fact than pramipexole in higher dosis can trigger addictions typical for PD (sex, gamble, shopping or eating), see also my post here
And yes, keeping the dosage as low as possible and taking only what is needed by listening to your body is what I keep doing and I really believe it helps me a lot!
Good luck!
Koru