My nerve pain experience is/was somewhat different. It started around 3.5cm and was manageable with a bit of numbness and shooting pains. It would hurt, but as long as I could do a squatting quad stretch the pain would go away immediately. I slowed down and took breaks from lengthening which helped, but the nerve pain didn't go away entirely. This was fine all the way until about 53mm which was the day I had the worst pain of my life. I had three 1-2 hours sessions of constant severe 7/10 nerve pain on my left shin, inside ankle, and calf area all in one day. Each time it struck all I could do was curl up in a fetal position, try and hold back my tears, and wait for it to go away. My doctor had me shrink the nail 4mm over the next few days. Since then I've been going pretty slow and I haven't had any major nerve pain, though I can still feel nerve activity on both legs. I'm still on Gabapentin right now and it doesn't really do anything for me.