Hey man, wow that is an old thread you pulled up by I think I remember it. Basically I'm not doing anything special to get them to spread. I started out with just 2 happy mushrooms and now a year and a half later they have probably become maybe 100 mushrooms. Not all of my varieties split that quickly. The fastest multiplying varieties are the smooth ones. Any of the mushrooms that have bubbles or hairy, or fuzzy don't spread as quickly. That means the green striped, the red, and the blue are some of the fastest. It sounds like you have already done a good amount of research, since you dug up that old thread, I can't really offer you any tips you don't already know. I'm not doing anything special whatsoever. If I was, I'm confident the quickest method would be to put them in a high flow situation where they would move to get away from it and leave lots of babies in their wake. IME, the amount of light they recieve has nothing to do with how quickly they multiply. Basically, all I can tell you is get the kinds that multiply quickly and/or give it time. I started out with 2 happy mushrooms a year and a half ago and now I'd guess those 2 have turned into about 100. But, for the first 6 months at least, I didn't see any significant multiplication. Just give it time. Attached is a picture where I have circled the 2 types of mushrooms I have that reproduce by far the fastest. Hope some of this is helpful.