Thanks for the input guys I think I have figured out the mechanical side of the project, I just need some info on the size of the main parts I think the main body sphere is 500mm and the head dome is about 300mm diameter. the lenses on the head i have no idea what they are or were to get them. if you know of a reliable sorce for this information I would be very grateful.

On another note.
IMG_1045.jpg

In the picture above you can see the motor can of one of the drive Bosch750 motors for Cherub. The last fight when it was unceremoniously thrown OOTA. the magnets came adrift , fortunately the clip that holds the magnets in place (with the adhesive) fel into the armature jamming the whole motor so when I took it appart the armature was in perfrct condition. I had a spare can with the magnet retaining kit already fitted. A nice easy fix.