maybe you guys can help me understand a think about pic related. it's a rappel system where you can descend the full length of the rope, if yours is 60m you can descend 60m for example. it works as long as you also have a separate 60m tagline/cord/whatever, which you use only to retrieve the rope.

my issue is that you are basically depending on a stopper knot. all your weight is against the knot and you rely on it not going through the mallion, otherwise you can't retrieve the rope (you don't die because the carabiner for sure can't fit, but still i consider that the system fails)

how possible is it that this happens in practice? obviously with rappel rings instead of maillon you can't do it, right? what do you do instead? i think my question is, aren't there any stopper knots that are bulkier, and that should be recommended instead of just a fig 8? obviously not monkeys fist, but maybe wrapping clove hitches around the figure 8 or something like that.