Ming, Thanks. Yes, materials cost is very low. The real cost is in labor for set-up and cleaning after the print, and amortizing equipment costs. I wouldn't want to sell it to others without more time testing and proof of design worthiness though.
Kodiak, good so far.
Danzig, I would but every time I try to get the Delorean up to 88Mph, I get pulled over for speeding.