The turbo failed on my PD130 Golf a few years back and I used these videos on how to remove, strip and rebuild my turbo. I found them very helpful, I just watched them over and over and had them on hand when it come to strip down. I didn't strip the VNT side down as mine was moving freely and look quite clean. I did, however, make a cocktail of petrol and injector cleaner in a bucket and rested the HOT side of the turbo in that for a few days giving it a little agitation now and again to make sure it was 100% clean and moving freely.
I removed the crank sensor so that the car wouldn't start and cranked a few times to ensure oil had reached the turbo and then took a deep breath and fired her up. No leaks and you could feel the difference a new core made to the car. After 1000 miles of slow driving I was happy things were settled in and later that year I took it on a 1000 mile trip to the ring and back and happy to say the car is still going strong now
Hope this helps