Just purchased a (2) 5 gallon tank, 1/2" fast bag, 2 switch, FB setup from Erika at CCE. I upgraded to (2) Viair 480 compressors, and SS-7 bags. All for my 64 impala. I've learned that this setup has 1 line to the front bags, that splits to each bag, and the same for the rear. Seems to me that if I run into the issue of the car sagging on 1 side because of weight, I will have no way to correct it. In addition to that, running 1 line cuts the fill speed to the bags essentially in half. Actually, I can think of a whole host of issues I might have by depending on just 1 line for the front, or rear. Looking for thoughts on this, or would you go with more valves to run each bag independently. I really only need front and back, but I'm ok with going to 4 switches instead of 2. Would anybody recommend going FBSS, or would controlling each corner be a better option? Last question, is it really necessary to monitor bag pressures? I really don't want another gage mounted on my dash.