First and foremost congrats to the designer, all parts fitted perfect and this model is amazing!
Printer is a Hictop Prusa i3 clone, with Bowden E3Dv6 upgrade. Slicing done with Simplify3D. Print settings are 0.2mm layers, with 2 perimeters, 15% infill, with supports AS NEEDED from build plate only. Speed is 35mm/s @ 210°C nozzle and 55°C bed. Printing took around 15 hrs combined. I did added to the design some windows to Optimus Prime's chest. The waist was printed with a script for color change to yellow using S3D. Highlights on the face, grill, feet and emblem were all done with a Pilot Silver Marker. Super Glue used is the Locktite Gel Super Glue.
Hope you guys like it and give it a thumbs up!