Brin,
What motor build did you go up to again? You went bigger than a 904 right?
I did the high compression upgrade and I get a fair amount of oil into my canister. Not enough to make me overly concerned but more than I did pre HC.
Ive also noticed that I get more valve cover seepage than I did before. I attribute both to having a stronger motor.
That said... instead of using just a breather you may want to consider upgrading to an oil catch canister like this one:
I bought one a few years ago but I did not pay 185 for it. That price has gone way up. Mine also feeds in from the top and has a drain plug at the bottom with the breather filter at top. Im sure you could fab one up.