Right you mentioned that in the spores and agar thread. Once you have the cakes colonized you can go to substrate monotub since they only need pasteurization at 150C and not sterilization for the crumpled cakes to colonized the monotub.

Now that you have a growing chamber you are only two steps away: add organics to the perelite and pateurize. The crubled cakes will colonize the water reservoir and you will get a breath taking flush if all goes well. I'd do it just for the fun of it (and ended up with too much).