since VE1 and VE2 are combined to form a single 8 bit value, there is no difference in resolution if you place the values in either one, so long as it adds up the same.
if you want the most possible resolution using stock code.... you would setup the BPC so that the lowest VE cell has correct fueling at 0% and the highest VE cell has correct fueling at 100%. that's VE1 and VE2 combined.
as you can imagine, this scenario is kind of unrealistic, since 0% VE would be a BPW of 0.
so, in a real-world situation, best resolution would be achieved with allowing the highest VE cell to touch 100% while retaining a correct AFR.
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