I was consdering changing my current setup (pantin footlocking) to a set up similar to this. One change has to only have one foot in the loop (left) and have th pantin on my right. That way I would be able to use both legs independantly. It would be akin to goin up a ladder. The upper ascender would be tethered to your harness as well. That would make the transfer to the i'D easier, imo.
It is similar to the three knot setup, only it would use ascenders, and would be automatic. It is also similar to the Mitchel system with different ascenders.
What do you think Tom, or others?
Carl