Crater Cutter kit
My challenge is to produce a reliable 10kV spark generator which will cut me craters with a plasma arc. You can see the general idea on my blog: http://www.wikihow.com/Etch-Your-Own-Crater? The 10kV spark generator is my missing ingredient, so Instructables please step forward with a design!
Once running we can re-create any planetary feature by means of Cathodic or Anodic erosion. I believe this is a genuine alternative to the current 'impact crater' scenario, so favoured by astronomers.