More words to follow:

Head, as per origional pretty much. Two carbon rods stop the blades falling over and getting caught in belt.

Custom (or homemade if you like) carbon fibre undercarriage. The skids are only 0.1mm thick capping strip. The curved parts were made from tows pulled through ali tube that was later etched off.

The plastic hoop was a belt guide but is no longer required, nor was it a very good example of one. Blades are cyno soaked paper.

New improved rear pulley.