OK, another Tragic incident. The oil seals on the Turbo blew on a road trip, thick Blue smoke and went through 4 litres to make it to my destination. 500 Km tow later it was home.
Removed the Turbo, sent it to a Rebuild shop that my buddies shop recommended, read good reviews online as well. He informed me that it was the seals that were dried up and shot out all the oil out the exhaust.
It cost me $670 to rebuild, they honed it out for an oversized bearing, made sure it was balanced, re-assembled it. The Cartridge was ok. I thought the price was a bit high since the other shop said it would be around $700 if they had to replace the cartridge. But it looked like a brand new turbo, so I was happy, until..............
Installed the turbo, did an oil change. primed it. Fired it up, warmed it up. Took it for a spin and the car made NO BOOST

and a terrible noise. Re-checked everything, was ok. Had my Mechanic buddy come over and he said it was definitely a Turbo noise. Ripped it back off, found that there was extreme shaft play and that the wheels were destroyed after hitting the turbine and compressor housings
Brought it back there and there were instantly on the defence , asking if I had removed the oil screen or check valve. Also saying they wouldn't warranty it cause I had a cap on the compressor side and had raised the boost pressure. They dissasembled it and said that it was oil starved and they said it was my fault
I then informed them that there was no oil screen or check valve, I have a oil gauge with plenty of pressure and have only raised the boost a few PSI.
I also asked how the old turbo had not been damaged if there was indeed an oiling issue. Keep in mind I drove 200 Kms with oil shooting out the exhaust and there was no damage to the turbo. Nothing changes and the new one blows up in 30 seconds
I really don't think this is my fault and am obviously very angry

They rebuilt it again and want $350, so I guess all I can do is pay them and slander there name all across the Internet !
Considering getting a fitting and checking oil pressure out the side of the head.
Also wondering if anybody knows the hole sizes in the banjo bolt of a TD05-16G
Any help would be much appreciated , thanks for listening