I had no idea that early Shopbots were built from unistrut and strut clips. My first thought was that they must have been sheer hell to keep squared up, then I guessed that most everything must have been back-welded. Anyone know if that's the case?
Sorry for the thread-jack, I've just never seen an old shopbot like this and thought it was infinitely cool.

I LOVE your desk chair, Pablo!!!