Talk:Dark Elixir Drill/@comment-34845842-20180626165610/@comment-31567912-20180725142936

The catch-up point is the amount of time the upgraded drill needs to equalize production should it not have been upgraded

Example: Lvl 3 drill = 45 DE/hour Lvl 4 drill = 60 DE/hour (+15/hr), but takes 2.5 days to upgrade.

The lvl 3 drill would have produced 1,620 DE during the upgrade time, which the lvl 4 drill has to compensate for. 1,620 / 15 (the extra production) = 108 hours = 4.5 days exactly.

I do not see the point in calculating this for all levels though. The info is useless as you will want max. production of DE as.a.p. :)