The recipe for the twisted chenille worm isn't long but some of the required tools aren't normally used for fly tying.
Hook: for this one I used a TMC 800 size 1
Thread: white 3/0
weight: 12 turns 0.035" lead
weedguard: twin loops of 20# maxima
tail & body: made up of oo olive chenille, twisted with 3 strands of gunmetal and bronze DMC metallic floss, from a craft store, tipped with chartruese maribou.
Tools required: a drill and a cup hook
1. The tail and body is made first. Cut a 28" piece of the chenille, and the flosses. Separate 3 of the floss strands from each piece of floss. Make a bundle with the piece of chenille, and the 6 strands of floss. Tie an overhand knot at one end of the bundle of strands; tie the other end to the upright on your vise.
2. Put the cup hook into your drill, and then thread the cup hook between the bundled strands at the end with the overhand knot. Pull the bundle taut and then turn on the drill to twist the bundle. With my cordless drill, I count to thirty, or ~ 150 turns, and then shut off the drill keeping tension on the bundle.
3. Place a finger on the middle of the bundle and bring the drill next to the vise upright. Pull your finger out of the bundle and let it twist into a tangled mess.
4. Hold the bundle next to the vise and stroke out the tangles, cut the bundle off of the vise and the cup hook. Tie an overhand knot in the end that you just cut off. The twisted bundle will stay twisted, indefinitely after the knot is tied.
Though they sound complicated the previous steps only take 2-3 minutes to complete.
5. Using a needle for support tie a tuft of maribou onto the end of the twisted bundle and set it aside. To me this is the hardest step.
6. Put the hook into the vise and lay down a base of thread. Wrap the lead weight around the hook, and cover with thread.
7. Tie in the weed guard at the bend of the hook.
8. Tie in the bundle with 4-5" hanging off the rear of the hook. Wrap the bundle forward to form the body.
9. Bend over the weed guard, bind it down and whip finish the head.
I normally fish this pattern in the weeds on days like I would fish a rubber worm. Different materials can make some very striking color combinations.