A start on armatures for black walnut trees

I've made a start on a pair of armatures to model a pair of black walnut trees near my house.

I found these trees to be a bit trickier to model than the white pines I made for the Loonar Module. These walnut trees have far more fine branches, and I'm still in the process of figuring out how many to include to give a proper impression. At this point I think the armatures still need more. 

My estimates at height suggest these trees are around 65' tall. My tree book says mature specimens can grow from 82' to 98', so the urban ones on which these armatures are based are a little on the short side. 

Those green limbs and trunks are made up from 26 gauge floral wire bundles, and the finer branches (the aluminum ones, which are admittedly hard to see in this picture) are twisted from 30 gauge.