'Did this last Fall ('09) with much help from housemates.

Early SketchUp rendering


Looking east on the inside


From the outside

Note the double-bubble-wrap w/ refelctive foil, on the ground.
We'd put that over it during the coldest spells this past winter, and it worked great.

Super-duper-pneumatic-lid-lifter

This was absolutely key to controlling temperature in the thing.
Finally got 'em installed mid-way throught he winter, and it made all the difference in the world.
Previously, we'd forget to open or close the thing, and it'd alternately cook or freeze.

Spring bounty, after the glazing comes off