Don't know if you're using Photoshop Martin but on plans the height to width ratio causes "squashing" at times. Battery used is "Ever Ready" 'Flat battery', NO it wasn't, it was three 1.5v dry cells wrapped in a flat cardboard pack. Power source of choice for TG18 or Mighty Midget motors.
PDFs for this and other MM free plans are available.
Regards Ian
PS. Scans good, photos c-ap.
And an aside, if you cut the ends of this plan to join up the back end, it DOESN'T work, pity the typesetters didn't try it. DAMHIK