I was going to ask you earlier about this. What would you say your machine is capable of for precision and repeatable accuracy for the CFM measurement? For instance can it determine to a tenth (0.1) of cfm? Then for a test repeated on the same port under same conditions say five times stepping through the lift range, what would you expect to see for variation for at a given lift number? I'm just trying to baseline the changes I see people reporting, vs machine capability. Changing something that on the next run results in a 10 CFM change may or may not be reality. I am/was an engineer and know that when examining test data, the capability of the measurement system needs to be factored into the analysis.