Lace Up Armbinder [Level 2]
Notes and Resources:
The great thing about this method of armbinder is that it's achievable on almost anyone, because the arms don't need to get particularly close together for it to work, and you can adjust it to exactly the tightness you need. The only real downside is how long it takes.
Since making this video, I've started tying this slightly differently; instead of starting with a full shoulder harness, I just position the center of the rope at the back of the neck, and split the rope, each side going forward over the shoulder and backward under the armpit, then starting the first arm-hitch straight from there. This is particularly convenient if you want to use doubled rope to increase the comfort of the tie -- in that case you join two ropes at their center points by lark's-heading one around the other, then the join goes at the back of the neck, one rope goes over one shoulder, and one over the other.
Aside from using doubled rope instead of a single split rope, you can also increase comfort by adding more, closer-spaced bands down the arms, or by using thick, squishy rope.
If you tie this tightly, or struggle in it a lot, the bands around the arms may tighten; if that becomes a problem even with doubled rope and extra wraps, try lacing through the arm loops instead of lacing up the vertical lines between arm loops.
For a slightly different look, you can also use French Whipping instead of reversing hitches -- you just have to avoid the tendency for the pattern to spiral around the arm with each wrap, so that all the stems are pointing toward the center.