The higher the volume of air that is allowed to flow through the PCV, the better the odds of it bringing oil with it. The two items that control this flow rate are the PCV valve and the diameter of the tube that connects the TB to the oil fill tube. If you're sure the PCV valve is the correct one, and is in good working order, try going back to the way it was with the tube going to the TB from the oil fill tube, and see if that doesn't help. Having an open element filter on top of the oil fill tube allows a much greater volume of air to be sucked in to the engine and out through the PCV. I'm not making any guarantees, but this is how the system works.
Take care,
~Chris
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