PSD Stage 4 / Full blend charger (needs service)

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Taken from a car I broke a good few years back now. Was keeping it as a back up but have decided to let it go if anyone is interested.
I have a PSD receipt from 04 where it had a "ported charger rebuild". Im not 100% as to what stage the porting work is but its quite heavily ported on both inlet and outlets so would assume at least stage 4.
Their is some wear on the scroll. I dont know the level of wear is deemed acceptable on a lader but I ran it on my standard G40 last year and it seemed to boost ok.

£300.