I'm just saying that we need to test and adjust things before have great expectation. We can set limits for what we want for the test, how long, how much to spend, throughput, etc.
Or try on the day and get the maximum lessons we can for the next one...
If we spent about 11.5 for 2.5 million tx, what we would expect to spend for a test of 5 million? and what we would need to do a preparation test of half hour?