You must be logged in and verified to contact the designer.
Generation 1 Autobot Matrix of Leadership.
This was designed based mainly on how it looks as Optimus Prime is passing it to Ultra Magnus. The actual drawings in the film vary quite significantly from scene to scene.
It has been printed in PLA before uploading and comes out great!
Originally this was designed to be a lot larger and printed in parts with LEDs inside with the crystal being translucent and an AA battery compartment which worked well and prints great on a home printer. This version has been scaled down and a domed centre crystal utilised for better results at the size.