I had 4 bouts of kidney stones, between '15 & '17. I had a 20mm on the right side and a 8mm on the left. I didn't get a stent, they blasted them. The 20mm, they had to blast twice.
My big deal was the catheter, doubled back over itself and would come out. For that, they gave me meds and waited about 25 minutes, then just jerked it out!!
They say that kidney stones are the closest men can come to the pain of child birth for women so, now I tell women that bring it up, that I've had the equivalent of 4 kids