I like this idea, but you would need to be careful to get a super-smooth join between the pull through and the new cable when getting it in. Difficult to know how loose you would need to make the extra cable tie. Of course, the 'star' only works if the three cable ties are quite tightly fastened, and placed at reasonable intervals (around 1.5m, I thought, but less might be adequate).I've got an extra heavy lightning conductor (#2AWG), and thinking of zip-tying the stars to it. (Did everybody who made these use three zip-ties?) And including one of those screw-mount zip ties with the hole tied into the star....and then circle that one LOOSELY around all the other wires.
That way I could pull a new wire alongside the "starred" cable through all those little rings if I needed to.
Gerald