Originally Posted by Famineguy
I am not familiar with the "5-20-40-90" cycle. I take it that this is time in each part of the process. Is any part of this bulk aging?
Here's a link to the WineMaker magazine article on 5-20-40-90:
I won't go through the specifics cause you can read the article yourself. The basic idea, however, is to let the wine have extra time, particularly at the end. The premise of the article is that wine kit producers believe their customers (wine makers) are in a hurry to drink their wine so kit instructions show the minimum days. In other words, wine kit producers compete by showing minimum days rather than best approach.
Overall, my takeaway from it is to follow instructions when it comes to things to do but try to space it out a bit, particularly at the end: the last 7 weeks in the article.
If you're going to give your wine extra time consider adding some S02.