How Many Bamboo Crappie Condos to a Spot?

[AgriHawg]

With my current project going on with my students (FFA) and the Corp of Engineers, it got me to thinking. What is the best number of Crappie Condos to put in one place? Say they are 12-15' tall and have a diameter of about 15'. I've placed them 3 to a spot and the Corp. with our current project is placing them 1 to a spot. I don't get to fish enough to know which would be better.

Also, if you were to drop more than two to a spot, would you group them up say in a triangle (3 condos) or square (4 condos) or put them in a line?

I'm thinking in a line, especially if there is some change in depth between them. Say start in 25' of water with the first one and by the time you get to the third one they're in 30' of water.

What do you guys think?