Bonsai-style training plum tree

Nice. I only have a couple of young newly-bought trees (one is 3/4” caliper, the other is tiny 2footer), so unless I find any more cons with wire aside from the girdling and extra work, I’m still leaning towards trying it atleast on a few branches. Now that the use of padding was mentioned, ill see what i can do…maybe use some kind of silicon tubing as a cushion…

How low are the lowest scaffold on the plums? Around what angle are they? How old?