Well, I never got the info I needed to continue with this GB. I am however continuing along this path as I have already commited myself to buying a new turbo and a wastegate
There is a handfull of guys out there making their own turbo kits for contiques. I will be one of them later this year and I do have the means to have my setup recreated with various grades of steel with the very best quality of work possible. Pricing will change depending on quality of steel, ect of course, but I won't know the specifics until I get into it.
Thank you all for the interest, hopefully something will come up shortly.