That is some serious wounding. I don't think my scalp is going to look like that even at 2mm. I've only had one session mind you. Does everyone here look that wounded?I dermapen once a month with the derminator 2, 12 needle cartridge at 1.25 mm on "fast" setting. I get my entire scalp as I'm a diffuse thinner. Hurts like a b**ch, too. Here's a link of what it looks like after five minutes. Since it's not an exact science, I err on the side of caution as to how often I do it. I also started taking a collagen supplement and I spray some Vitamin C on there afterward, which helps collagen production. Probably not necessary, but placebo is a real thing. The Vitamin C comes in a powdered form from the site I bought the derminator from, and it also stings like a son of a b**ch. Since it's uncharted territory, I'm just making it up as I go with the little I know about anatomy. Hope that helps!
I don't use a stamp so it's not quite the same scenario. I just map my head out into three longitudinal sections over my whole scalp and go over it in columns and then three latitudinal sections over my whole scalp and go over it in rows so everything gets hit twice from two directions.
EDIT - MY MISTAKE HE IS USING finasteride, MIN, DERMAPEN and NIZORAL. I FORGOT TO POST THAT.