I bought these tab washers ages ago for using lock wire on fixings that you couldn’t drill, thought I’d try them on the turbine bolts. I have no idea how these are supposed to be installed and there are no pics online, so hopefully this works:
Moved the car from its grave in Kent to my new place in Matlock. Bought some posh wastegates. Draw filed my turbine housing flange flat, which took forever.
With the car outside my house now I should be making more progress.