I stream poorly in std but well in mania such that I can easily burst out up to 320 bpm and sustain it if I mix wrist jack and trill diligently. To sustain high bpm requires to not focus on whether you are falling behind or ahead, but just doing it like clockwork. In mania I am able to do that because I have a feel for how I hit and know the speed I need to hit at.
My reading in std is worse than mania and have no feel for how early or late I am hitting. So I end up playing around with speed and throwing myself out of balance. This often causes strain as I force my self to catch up by making finger move up or down when it's in the process of doing the opposite, which leads to fast stamina drain.
If I had a higher screen refresh rate, I might be able to sustain higher BPM in mania, because as soon as it goes over a certain bpm, the notes are close enough that they double, which throws off my reading, I fall into trying to get the speed right, and ultimately deplete myself of stamina.
Anything not reading related is a matter of fine finger motor control - making sure you achieve the right resonance such that you are not making your fingers go in the opposite way than what they are currently in the process of doing. You will get a satisfying vibration like feeling if actually do this.
