I don't recall whether I mentioned this earlier, but I have asked prop-shop in England make bronze shaft brackets for my PT-15. They are custom made for me so this is probably the most expensive part of this boat. I felt that was needed as I don't trust the plastic ones in the kit for running 20k+ rpm.
Furthermore I also ordered propellers and shafts from prop shop for PT-15. Prop-shop is the only place I have found that produces tiny brass propellers in high quality. Here are some pictures of it all: