I changed my MD376 turbo myself on my leon, Changed the oil and filter. Ran the turbo for 100 miles and changed the oil + filter again. Running it currently on a jabba stage 1 custom map. It is booked in on the 17th June at Rs Tunning to have a fully custom map. You wont have any trouble with jabba there great.
Turbos dont need alot of running in as long as they have good oil, thats why they insist that its changed.
Im planning on changing my oil every 3000 miles, so purchased 20 litres from tps only £68,
Looking forward to your guys power curves.