Hello to All,
Here is the Walmart R2D2 project.
I disassembled the unit and was surprised to find it was more than a shell. There are opportunities to use the inserts in the dome to mount LEDs and a camera, and a bearing ring which has a ring gear to allow the easy installation of a servo or gearbox to move it. I found, using a flashlight, lights can be mounted against the skin to light up the panels.
The body has some areas which can be modified or changed out for more flaps or lights. Due to flat areas on the bottom of the body, mounting an additional front foot should be somewhat easy.
The legs have a flat bottom and a pod to mount either a motor or continuous servos for the drive.
I will soon begin the build by 3D printing a front foot and mount to see how the project will come together.
There is a 6" Ruler in the front of the pictures for reference.
Ron R
Other robots from Synthiam community

Mickey666maus's UNITY LINK / ARC

Ericez's Rori The Coffee Robot For Movie

Hi @rgordon,
I have gotten all the .stl files together. I will do my best to answer your questions.
Ron R
Update: 2/8/2016
Here is some old info on how I installed the front and anti tip casters. The addition of the anti tip casters improved the movement quite a bit. I can't give a source for the parts because they have been laying around for a while.
Ron R
Sorry, I screwed up and didn't get in the pictures yesterday.
Ron R
The problem i have had with these types of casters is that they work fine if the floor is totally smooth,but if there are any small groove or gaps sure as plank flooring it tries to go hung up on that. The floor in my robot room is garage flooring that has a slight texture to it and the robot struggles with that.. Makes motion somewhat jittery.
Thanks for letting me know. I have a playroom floor which is smooth so I was never concerned. I wonder if a Omni wheel would work better ? A 2" to 3" would fit real nice.
Ron
I think that a small swivel caster that has a black rubber whell might work well,if you have space to mount it.
Yeah, sounds like a way I might have to go. I'll look around to see what I can find. Thanks,
Ron
Everything looks fantastic, as others have touched on, I would use a larger 1 inch swivel caster wheel. The third leg is fantastic ! great use of 3d printing.