All I know is 4.2 is gold. I usually credit 80-85 while only logging 60-65 a month. This next trip is a block trip bust most the 4.2 guarantee will bring the credit up higher than block. Building flight time is a slow crawl on the Q. Been here for 18 months with 120 prior 121 time and am still 100 hours away from 1000 121 time