No matter what the depth is tight to the margins of your local commercial carp fishery, this rig will catch you fish from there. It is one of the best rigs to use to catch the huge carp that patrol the outer perimeter of all commercial carp lakes countrywide.
A A short, fat and dumpy dibber pole float is best for tackling the shallow water in the margins. Often these floats are only 3 or 4in long, so therefore they won't interfere with the carp in water only a foot deep. They are seriously strong too, and because of the buoyancy in the tip they are ideal for use with big baits like meat and multiple grains of corn.
B Mainlines and elastic must be strong when fishing in the margins as you are not only dealing with big fish, but you are also fishing really close to snags. Ideally use 0.16mm lines at least, and elastics no lighter than grade 16.
C Attach your pole float using three strips of silicone tubing - this will help lock the float upon the line securely.
D Use only a few shot to cock the float. Three No8 may be perfect. Group the shot together below half depth to push the bait to the bottom quickly.
E Your hook must be set so that it either just touches the bottom or is fished slightly overdepth. The margins often slope quite steeply, so plumbing the depth is absolutely critical to successful margin fishing.