Tiger nuts are a great bait for carp, as Terry Hearn will tell you, but how do you present them on a rig?
One of the best ways is to make them semi-buoyant with the use of cork. Here's how to make a simple balanced tiger nut rig...
1) Using a nut drill, bore a hole through the first tiger nut
2) Drill halfway through a second nut and insert a cork plug
3) Trim off the cork, flush with the outside of the first nut
4) Mount the cork plug and nuts on a hair, and add a bait stop