There is some bias in my switch to three vessel. I am looking to make the move from the garage to my basement in the near future. I will then have limited vertical room for hoisting. Going single level three vessel will make that possible. I'll trade washing the extra equipment for hauling it from the basement to garage and back every brew day!
I had tried all kinds of different crush sizes too. Part of why I decided to give up is that no matter how coarsely I crushed there were still plenty of fine particles to clog the bag. I had reduced my efficiency from the 80's with straight up BIAB down into the 60's trying to make things work. There must be something about the structure of a traditional grain bed that captures those particles without plugging every possible path for the wert.
You might want to check out post #7 of this thread of mine. I love BrewHardware, but I am concerned that if you don't control the flow carefully those false bottoms will crush like my pizza pan did. When that bag gets clogged it puts more pressure than I would ever imagine on that bottom. Surely Bobby's false bottoms are stronger than my aluminum pizza pan, just not sure if they are strong enough if you get a stuck recirc.
I just want to emphasize again, I think BIAB is great. It really got me started on all grain long before I could have managed to go the traditional route. I think it's virtue is in KISS. When we get into all this fancy stuff it doesn't seem to work as well. (For me anyway.)
