Takes time to work up. Took me months to get to 6iu daily, maybe even a year or two, going up 0.5iu a week or two weeks, sometimes having to back it down.
Then going to 10iu was just, pretty easy. Even took a break for a few months and was able to jump onto 10iu right away with no problem. You actually start to miss, crave that CTS.
My fingers are always numb anyways from sports.
I've been on 10iu for about a month now, I bet I could jump to 14iu tomorrow no problem. Definitely get the tingles sometimes but it's never debilitating, though I wish.