CaseyJonesIII I should imagine that several thousand players have done the calculations already! Recent achievements have seen players being asked to unload 3.5 M in 4 weeks, so I personally need to spend a few days sending my fleet round on shorter profitable runs, unloading 12,000 to 14,000 wagons each round. Now if I just did that every 4 hours at the same time I sent my ITs, for the Tenacity 3, that's about 50,000 per day, including a few whistles blown here and there, so 500 days required. Every extra run I do, say for the 7 minute Special Timed Destination or a few 5 minute runs as I may, is a day off that 500. So while I am yet an Earth resident and capable of simple arithmetic, I can safely predict that I will, in my game at least, complete Tenacity 3.