for holding a larger rope and then hopefully be released easily,
Nooope! On both counts...
1. I have tried the RT stopper repeatedly with ropes of equal diameter, and it holds better than any gripping hitch around a tensioned rope I have used. Do not see it as it shown when it is used on the mooring lines... see it as a hitch around a tensioned main line of the same diameter. I know that I have to say it again and again, because it is hard to believe that such a simple mechanism works as well as it does, yet it is not known within the knot tyers or climbers word... and that is exactly what I am doing...
2. It is released
far more easily than any friction hitch, just by moving it "upwards". When the angle between the crossed strands and the main line becomes larger, the gripping power disappears, and the hitch is released immediately ! Try it. After it is in a steady, gripping position, just push it upwards a little, shorten it, and you will see this effect.
As for using it, the RTs as a climbing hitch, that remains to be tested.
I promise I will not test it as a climbing hitch, or, even better, I
swear I will not test it as a climbing hitch...
( I have thought of it only as a temporary, emergency stopper. )
without dressing (fiddling) multiple times
On 1/2" nylon kernmantle, 4 pairs, or at most 5 pairs of crossing coils are enough, if you also use an interlinked-hitches ending. Unless you are sooo much heavier than me...
accidentally bumping the top coils and going for a slide.
This can not happen with the rat-tail stopper I think, because the hitch is automatically elongated again, in no time . It might be a danger with the climbing friction hitches, but not with the rat-tail stopper. That is one of the MAIN reasons I like this hitch. It grips very easily, without having to be pulled by a sudden pull of a great weight.
too little angle of the crossings Or too much angle is detrimental to its grip. This is all very subjective to the material being used. And the expertise of the user!
Right ! THAT is the main "problem" with his hitch, I think. It might come out that the
optimum angle of the crossed coils depends on the material, or the initial dressing, or the expertise of the tyer too much, i.e. that it is a hitch sensitive to too many parameters. That remains to be seen, and proven to be true or false.