My husband and I have built "Torpedo" the Charkha from the specs from Spin-Off Winter 1996.
The box is a "Hoja de Habano" Cigar Box. Inside features wheel with orginal Dave "Pi" designs. The spindles were built from double pointed knitted needles purchased from the Loop Halifax.
The Charkha works every other day - as the hunt for a more effective drive band continues. Right now it has cotton yarn and it isn't as effective and consistent as I would like.