I've only logged 130 hours of printing on this project so far, to get the cyclotron, synch generator, main body of thrower and N-gague but am guessing it will take 5 to 6 2-lb. spools of 1.75mm filament if I print with a 4% fill, 4 layers of walls. Layer height varies between 1.5 and 2mm depending on the part. Actually a few parts that are hidden from view (like the cyclotron support) are being printed at .3mm height just to shave some time off of this project.