I'm with those that like to leave in primary for up to a month, and minimum 3 weeks in botttle, if you can stand to.
T-58 is probably ready to bottle in 7-10 days at 20C, but if you don't have a good way to sample without introducing oxygen, that's another reason to just wait a while.
(Everybody here talks about sampling a bunch, but doing that from a basic bucket/carboy never seemed particularly viable to me. Easier to be patient. If ale fermentation is still going after a month, there's something very wrong. When bottling I would take one reading after commiting to bottling already. I keep bottles in a plastic bin for a month+ in case of bombs, but I can't recall ever having one burst.)