Re: Vro
As stated, its a personal decision.
If you remove it, and someone forgets to premix you blame removing the VRO for the rest of your life.
If you leave it, and it fails, you will blame leaving it for the rest of your life.
Its really a no win situation.
All kidding aside, just do what you are comfortable with. There is some reading about it in the FAQs.
My personal opinion about it is on the earlier ones like yours, I would remove the oil side as stated by Boobie.