I am not giving up on D3. I just wanted to point out the limitation in the default tree layout and the complexity around it. In fact there was a discussion abou

I am not giving up on D3. I just wanted to point out the limitation in the default tree layout and the complexity around it. In fact there was a discussion about variable sized nodes in GH and a plugin is in place now. Might be useful for you if you are heading down the same path - https://github.com/mbostock/d3/issues/1992 https://github.com/mbostock/d3/issues/1992