I am a small producer that in cental WI that would be interested if you would decide that a R.O. is O.K. in the operation. I make about 300 gallons a year on a 2x6. It is all sap collected from bags and buckets. I am a member of CNG which I get inspected each year to make sure I am keeping the trees in good health and the cooking operation clean and natural as possible. You can send me a pm if you are interested in my syrup. It is filtered and I store it in 15 and 30 gallon drums.