you have see through cups as pots and asking us if they are root bound?? heh just kidding, but it does look a bit slimy in there.. i don't know where you are but i'd repot them in spring for sure.
There isn't a lot of diversity as far as Trichocereus go and the owners don't seem too interested in pollinating them. The one odd plant we found appears to have grown by its own means.