[Mistero]

Update. Rebuilt turbo is back and shiny with most of its internal components replaced. AET supplied a gasket kit and fitting instructions and I've throughly flushed and cleaned the oil supply and drain pipes, but I have a question re priming the unit with oil.
Basically, when in place, the oil feed pipe is fixed at both ends and doesn't have any flexibility to facilitate top up at the left hand side of the engine where it connects with the oil pump. Additionally, the instructions say to check the unit is receiving and draining correctly by disconnecting the drain pipe and running to a catch can. I think this is impossible because the drain pipe is rigid and held into the block by the support bracket for the first soot filter.
Suggestions as to how to prime it greatly appreciated, please. Thanks.