Finally got the back of the motor vented. On my last track day the catch can filled up quite quickly within two sessions and making a mess in the engine bay. My friend horsepower_church suggested increasing the size of the line and also vent the other side of the motor. I was running -10 line only from the oil filler neck to the catch can. Now we are running -12, from the back of the motor and T into the filler neck line that goes into the catch can. We’ll try it out on the next track day and see how it does.