Yes, the 95th percentile means that only 5% exceed the specified size, but day by day this figure fluctuates. Regarding fee optimization, I tried manually setting fees on all channels to approximately 800 ppm, and then progressively, over many days, lowering them and manually recording the number of successful payments, the total payment amounts, and so on in a spreadsheet. When you look at the results over a short period, it seems like you've found some optimal fee, but as more time passes, you realize that all these fluctuations have some other internal nature.…