I think water cooled wastegates are more a marketing ploy. Only time I can see one being anyuse is during something like an endurance race but even race cars don't run them I don't think.
Turbo is all back on. Doing a fresh oil change tonight before I start the car up. Then it's for steve to weld on the V-band flange onto the wastegate pipe and we are all good. I'm itching to drive her again now .