I was just watching someone on Youtube transforming Masterpiece Star Saber. The transformation and 'Evolution' gimmick (as they'd call it in PotP) reminds me of G1 Powermaster Optimus Prime (the original from 1988, not TR). Even the way Saber (the small robot) folds up to form the torso of the bigger robot is similar to the Optimus Prime. I've never owned a Star Saber toy in any form before, so I've only just realised this.