First experiment in a long, long spiral. 3mm Pine plywood cut with a single movement into a 3mm x 3mm spiralised strip.
The end result was surprisingly – or unsurprisingly? – very, very springy and extensible. The final spiral was long enough – and flexible enough – to reach two stories down from the deck to the garden and still have several coils on the ground. After shortening the spiral, the end result works as a lampshade (for a LED lamp, no heat issues to contend with).