Probably the most effect a rig and line has going through a swim is when it is fished close in and under your feet.
You lot have probably seen endless methods and rigs for targeting close in carp but I tend to stick to just one.
Here it is...
I use a leader sleeve or a rubber in line insert. I like to use this instead of the buffer type stopper bead because with that set up you require some bolt stops such as beads and when im looking to pin everything down i want extra putty on the last 4 metres so i'm not looking for any further obstructions for the lead if my line snaps far from the knot in the lead core. This is the main reason i look to this type of set up. It easily turns into a running rig once you have a run, but the fact is it takes a little pressure to get that lead moving. Note, i have chopped the swivel off and goes directly to the lead, you can squeeze the swivel so it makes the eye shallow but i prefer it like this. Id top this off with around 1.8 - 2.5m of Leadcore at least, if im fishing very close in then i'd happily have leadcore running through the eyes on the rod.