That's pretty much the same setup as I built. I've got 2x #12 lines coming off the valley cover rather than the rocker covers. There's less
oil mist in there. Easy to do on a Gen3 as there's no distributor in the way. The tank is baffled and has an
oil separator setup inside it. It's fairly large volume and would hold 3L or more I would guess. I don't get much
oil mist through the filter but after that last track day at Winton it collected a liter or more of oil. That's why I've plumbed the return line now.
Cheers