Which made me think about revising my self rescue system a little from the 3:1 system i originally picked up into a variation of a 2:1 like this:
Instead of a separate red line... The slack that comes out of my clove hitch on the anchor.
Instead of pulleys, jumars, grigri's, etc... Locking krabs, prussiks and my ATC with an autoblock/guide mode. (i tend to belay off the hip with a redirect most times)
Also an overhand loop to put my foot in on the red line to save my arms.
Most of the time, you only need to haul the second a body length or two. (you can't haul an unconscious second, who takes the draws off?!?)
Quick to transition from belay, haul or lower, while still easy to tie off and escape from.
Instead of requiring an upward pull or a redirect, you can use your foot and/or bodyweight to haul instead of your arms.
The amount of rope hauled with each stroke is more than just a few inches, with the belay device on the anchor, you can haul as much as the ledge allows you to move.
The combination of extra rope hauled, being able to use bodyweight and speed of assembly/disassembly makes up for the slight mechanical dis(?)advantage.
Does this give any real mechanical advantage when done without pulleys, rope drag and a heavy bag of meat hanging in space on the other end?