You wrote: “Today they use laser if you cannot pass them, it is a pretty pain less procedure.”
I passed one stone a few years ago from the right side... came out like a spit ball into the little basket the Doc gave me.
I had five stones more ready and waiting in the left kidney. Did the homium laser thing. Very painless. The nurse gave me the anesthesia, I blinked and woke up in the Recovery Room.