Lesson learned - the thinning shears gives an excellent extremely short haircut. Like putting a #3 or #4 guard on the clippers and buzzing the head. To bring the haircut even closer to the scalp, the "Stinger" (I believe that's what they are called) clippers are used.
Frankly, I'm not exactly happy with the close-up footage. There's a lot of shakiness, although my cameras did their best with having a stabilizer, it wasn't enough. Luckily, I had set up three other cameras, so there's still lots of other great shots. :D
I'm now at 30 minutes. I'm going to grab lunch and get right back to editing.