thats part of it - different paradigm - no doubt we're visualizing two very different machines! its building metal working cnc's that interest me, I have little interest in wood machines for now. my thoughts were that a heavy weldment, using structural shapes could be filled with E/G and you'd have a chance at a metal working machine, small work envelope but very heavy and rigid. still, from I've been able to learn, its advantage over steel/CI is in vibration dampening, not strength or rigidity.