Saddle setback is measured by dangling a weight from a string that extends from the tip of the saddle down and over your front derailleur behind the bottom bracket. On a flat surface (not a driveway or garage floor) you then measure the distance of that string from the center of the bottom bracket. Typical setback measurement is around 80 plus or minus 10mm.
Yeah tilt the front of the saddle down a few degrees to relieve pressure on your perineum and to equalize the distribution of weight between your pubis-ramus bone and sit bones. Then you can tilt forward with your pelvis so your lower back will be straight instead of rounded. That gives you additional reach and it's more comfortable over extended time. It sounds like you'll have to lower the saddle and move it back a bit, maybe 10/10mm or more.
I would ignore KOPS.
Last edited by duckhuntr; 04-26-20 at 11:07 PM.