Hi Alex,
 
The connectFrom: [ :value | value // 3 ] , in this case, create edges you probably do not want to have. Such has 0 -> 0. Apparently the layout cannot handle this. Would be great to fix this by the way.
 aha, that make sense; thanks

I have to say I did not understand much about the other questions.
Sorry I wrote that as sidenotes without much context.
I've rewritten it https://gist.github.com/peteruhnak/b62c776bcb93dedb849b so it should be much more understandable.
 
- you put the script to execute in the chapter
Yes, I'll change this.

Peter