Has anyone here been "brave" enough to replace a turbopump on a Varian 1200L MS/MS system? If so, can you give any suggestions as to how to proceed on this installation?

Also, if anyone has any leads on obtaining a refurbished Edwards EXT200/200HI 80v turbo pump, please let me know. I have only seen refurbished 24v Edwards EXT200/200HI systems available, not the 8v.

Thanks!!