Thanks Kanurys theres a load  of good info in your thread.

because subaru knew there was a problem with the shaft seal and updated it from rubber to viton is the diff between doing it agian after 200000km or 50000kms I a.m very picky about oil pump seals the rest not so important oil pump critical have seen many aftermarket oil pump seals fail or pop out also I glue and stake the shaft seal in this one little seal makes hudge grief and you whould save mabee 10$ on buying aftermarket ones

No problem. There is a lot of text in there to read but hopefully it will give you some insight into some little details.