Techtree from Spring - Balanced Annihilation 7.01

I've created a techtree from Balanced Annihilation. As you can see... it's a little complex ;-) See the attached PDF. The file was created with graphiz:

dot -Tpdf techtree.dot -o techtree.pdf

The .dot file was created with the AI i'm currently working at, see the source code for more details