Is there something terribly wrong with doing PCV the way it was engineered to work originally? On the subject of a PCV over a draft tube setup, maybe it was coincidental, but engine life almost tripled when the closed loop PCV concept came into general use, probably because virtually no road dirt was allowed to enter the crankcase. I was making a living running my own shop during thzat transition period.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!