Further information has come to light regarding that first behind-the-scenes photo from "Star Wars: Episode VII" last week.
Alongside director J.J. Abrams and Lucasfilm president Kathleen Kennedy, the other two guys are Lee Towersey and Oliver Steeples - Star Wars fans and members of the worldwide R2-D2 Builders Club. The pair create fully functioning, film-accurate astromech droids like the R2-D2 seen in the photo.
They are also officially part of the Creature Effects team for "Star Wars: Episode VII". The pair are working full-time at Pinewood Studios focusing solely on building and maintaining working condition astromech droids throughout the production.
Towersey says: "What we do need to do is improve on the mechanics. We’re currently in a research and design phase where we’re looking at drive options for reliability on all possible terrains, whether it be a one-motor-does-all, or a system which is easily adjusted depending on terrain. We have a few mocked up ideas which we hope to road test very soon."