different rules
IACO rules require a 1 minute outbound leg and don't care what the inbound time is which is much simpler than FAA rules but somewhat less precise. FAA rules require 1 minute inbound leg which is where trying to adjust the outbound leg gets tricky.
My method is to fly the first outbound leg for 1 minute from the abeam point. Then time the inbound leg from the point that I intercept the inbound course line if I fly through it, or wings level on course inbound. If the inbound time is 70 seconds, I know I had a tail wind going outbound. I whip out my trusty E6B and place the 70 second mark under the 60 second mark. The index pointer then points at the new time (51 seconds)I need to fly outbound, which in this case makes sense. I have to shorten my outbound time to allow for the tailwind to get my inbound time down to the 60 second target.