They all work. Ledger rigs/flashers in flat calm conditions can see you yanking 2 Gurneys at a time. Im a convert to fluorocarbon now as trace line. I don't use it for its invisibility factor, more its durability and ability to hold its shape without screwing up and getting tangled. Gurneys are suckers for a bit of bling, needle skirts, small flies a bit of movement all helps. Should be a few yanked this weekend.