I find this thread truly amazing in its detail and the journal you have kept. I have been a supra owner over here in the US for years, and I write many tech articles (see my web page) and I havnt seen such a detailed step-by-step journal like this before. I also envy your garage/tool set up~!
I have a question. I have just completed my Hybrid CT-12 USDM Turbo package. It will use Garrett GT28 non-ball bearing turbos. It will also be sequential. The reason for this post is that I wanted to know more about how you installed the water lines. Either I missed it, or you didnt go into that detail. I saw that you plugged the 2 water lines at the neck, but I could see where you eventually got your water supply for the turbo. Unless of course your not using them. Also, where you using 2 separate oil/return/feed lines?
Sorry for dredging up a older post, but I did get carried away reading every page~!
Stu Hagen
http://www.97supraturbo.com