Hi,
For whoever needs it, I compiled some 3D material densities to add to the materials custom libraries:
;; 3D printing plastics
;;
*ABS,1.04,grams,centimeter,Plastic,Plastic
*ASA,1.05,grams,centimeter,Plastic,Plastic
*CARBON-FIBER,1.3,grams,centimeter,Plastic,Plastic...