Not having much fishing experience, I have messed around with a couple of variations of bait presentations. Only recently was I succesful using a hair rig, the carp weren't moerse big, about 3kg's, but it worked nontheless.
I made a rietvlei trace with two hair rigs each fitted with 12mm boilies. I stuffed half a "Coryx" effervenscent tablet into the cage & packed bom around it. This worked everytime I tried & produced bigger carp than the other rods close by which were loaded with floaties, mielies etc.