The wires when bent 90 degrees maintain their position extremely well. I'm used this wire extensively - & thinner - from one of the companies I worked making NDT instrumentation, in R&D. We used to have some of our miniature sense-coils made in a specialist wiring company in Malaysia, this would have been perfect for them to handle.
Regarding twisting wires Paul, one should never twist clock & data wires together as this will enhance cross-talk leading to corrupt data, only balanced signal lines such as RS485 should be twisted. As only running 8 led's I've slowed the clock rate to negate any possible problems, my clock-pulse being of only ~20uS.
One of the two four-pipes;
Not quite 8-valve, but 8 bit 
Mark.