Calling all left-handed one-handed players

[nitrostatic]

Alright, this is specifically to the left-handed one-handed players.

What advanced technique have you guys discovered (if any) of how to FC songs like Delirium, Thinking Different, CIA Rave, etc without your arm getting tired as hell to the point where the fingers stop wanting to move?
We all know that keyboards werent made for lefties and playing with our right hand isnt as pottentially fulfilling as with our left hand because its not as strong and one handed makes it even harder.