Your in too deep now, *Darth Vader voice* I have you now. I'm also not your father.
I don't care if you only keep a trio(preferably six), of either americana or australasiae in a single sex environment but now you must aquire them. I know without a doubt you have an empty enclosure, sitting forlornly in storage.
On a colony update it seems the cheese balls oils were what was keeping the roaches from climbing well, as things have worn off the smaller ones are able to get higher and higher, but still fail. The larger ones don't even try.
I think next month I will order some petroleum jelly, it's not an urgent matter. Hopefully I get some good pictures tonight.