What an amazing project! Thank you MakerBot for the great instuction manual.
Total Print time on my RBOBO3DR1+ was 43.1 hrs for all the part, (some 81 build plates) This model of the Radial Engine if fully functional, all valves/pistons and gears or moving in proper timing.
Materials all PLA Hatchbox
White - 27.1 hrs
Silver - 5.3 hrs
Orange - 10.7 hrs