Andrew,
I'm willin to help out. The more time I get on a Turbo system the more I can learn.
Best thing now is for you to get the compression check done so that you can confirm that your engine is OK, and piece of mind.
After that we all can start brainstorming about where the oil is entering your system (still think it is the seal behind the compressor impeller) but I think it is best to check EVERYTHING. Also, what would be good now is to have your engine bay "Steam cleaned" or at least pressure washed to clean all the oil out of the bay. I believe from the pictures you posted that the entire engine comartment is covered, and cleaning it will help us find the leak.
Let me know when you want everyone to meet.
Cheers
EddyL.