Grow-bot-oh! I have always like this little app, creating complex recursive, procedural meshes is so easy and fairly intuitive as well. Braid Art Labs now has a beta available for groboto v3. If you feel so inclined, download a trial version and mess around… for those of you who have done any type of technical / industrial 3D stuff, I only have 2 words… PIPE MODE. ‘nuf-said yo.