Travis,
I started doing these in 2001 after multiple rod guide & tip guide damage from other leader knot systems and it's the way that has evolved for me, to use a hook in a drill to pull against and maintain pressure on the twists.
The twists are tight as...the size of the image and the size of what can be written in a short piece can, at times, make it hard to sink my teeth into the rigging as 'perfectly' as one would like.
Use a nail or hook in a vise...use a hook that keeps your screen door open if doing it by yourself if you need a solid object to pull against to make the twists compress. It is far harder on the hands and makes less leaders.
I'm talking about a style that can make 50 leaders in an hour between 2 guys...and they're all tight and evenly wrapped. I won't use it otherwise.
As long as the 'final product' is a twisted leader with equal, compressed twists. I've seen numerous attempts to make it easier or do it differently for the same outcome....whatever works eh??
Cheers
Aaron.