Derma roller vs Dr. Pen for microneedling

I have used a 1.5mm roller in the past, and while it was quite uncomfortable to use, I always managed to cover all of my receded front corners and some of my forelock.  I tried the Dr Pen 16 pin (I would have used 32 but these were the size that came with the unit) at your recommendation Dr. Rassman, a few months ago, and it was more or less unbearable. It feels like it’s jackhammering into my skull. I lowered the depth to 0.5mm to see if there was any difference, and it felt the same. I can scarcely use it over more than a couple of areas, and holding it flat against the skin in one place for up 10 seconds is more or less impossible. I need to emphasize the sensation of it reverberating through the skull, like having teeth drilled.