Needs must with quiver tips,most of the time its a backlead and the rod top but. A while back fishing a heavily pressured Thatcham section of the Kennet we had swims full of barbel (ha ha nowadays) but not one of them would rap the rod round. I sat that evening getting donked, with over 20 pickups so frustrating,but really interesting.The next time out i used a banded pellet, a single swan shot on a link of line and 8lb line straight through to the hook,i held the rod with barely a bend in the quivertip and hit every donk,they were very fast and solid, single taps,16 barbel in the first morning my mate could not get set up quick enough.For a few seasons we would each catch 10 plus barbel every morning we fished there,in the afternoon fishing a different harder section. Most of the other anglers on the section caught very little during the day,most thought the taps they were getting were minnows.I do not have the need to do this now but at that time it made a big difference.Also when fishing lobworm with swanshot i like to use a quivertip to, 1, give barbel a bit of low resistance when taking and 2,to pick up bonus perch and chub which reject upon feeling resistance.