So I checked mine yesterday. Filter looked good after 80k just a few specs of material lodged in there. I cleaned it and reinstalled it. OCIs are every 3k miles with amsoil. Tried to do the AVCS on driver's side and decided to wait until timing belt replacement.
From beginning to end it took me an 1 and 1/2 hours. Mostly because of a bunged up thread and testing and adjusting my wastegate actuator.
Tips that worked for me:
1. with my upgraded turbo I had to remove my wastegate actuator
2. the stubby wrench was very helpful
3. I used fishing line to dangle the crush washer next to the block
4. It helped me to take a step back a couple of times because my hands were in weird positions and I was getting frustrated trying to break loose the banjo bolt.
For reference the subaru part numbers:
the bolt is 14445AA090
the crush washer is 803912040 which are sold individually(2 or more)
also the driver's side AVCS pictures and steps are on page 11 of this thread http://legacygt.com/forums/showthread.php/2-5gt-turbo-oil-supply-banjo-bolt-filter-removal-61689p11.html
Good luck all
Jon