Ian Lewis is firm believer in heavy leads in the margins...
Once winter is over, nature starts to blossom and finding carp in the margins becomes more commonplace.
This is when I like to start baiting spots in the edge. Setting subtle traps is a favourite tactic of mine and after many years of honing this technique I've become a real fan of the drop-off inline lead arrangement.
Generally I use a hefty 4oz bolt bomb which I like to lower into position rather than cast. It has a low centre of gravity and the bulk of the weight is towards the rig end which really sets the hook, especially when fishing for those finicky feeders.
After the take the lead drops off due to forces applied from either direction and it brings the fish up to the surface, which is perfect in weedy conditions. You are then in direct contact and the carp is unable to use the lead to its advantage in an attempt to throw the hook.
There is also the safety aspectof no lead trailing in the event of a cut off. Couple this with a short balanced rig and it's a deadly approach which has produced fish to 43lb 14oz for me.