Looks good....I think I could do the same thing using the soft wire ties....also, I had hydroton on my soil surface, but removed when I transplanted. Do you find that the hydroton keeps the moisture in?
I use the hydroton only to assist in spreading the top watering more evenly. Also, when I do the LST with the wire into the soil it keeps the leaves from sitting in dirt. They do hold a small amount of moisture, but it's mostly to aid my watering evenly.