For me time is valuable. One pass Is better for me. I run my operation off a 30kw diesel generator. I burn through 6 gallons of fuel every ro/boiling section. I’m adding more taps and if my math is correct if I add another membrane I’ll only Have to ro and boil at the same time for 4 hours instead of 6 hours with less taps.😁 cutting down on fuel overhead. Every time I clean the ro it takes 4 hours and 4 gallons of fuel. Will be moving sugar near the road in a few years with electric!