Mike Salisbury has a great tip for adding buoyancy to dumbell hookbaits...
After you've mounted your bait on a hair, cut a small sliver of cork stick (available from most tackle shops) mount it on the hair, slide both the dumbbell and a piece of cork onto the hair and finish with a boilie-stop. A little bit of experimentation may be needed initially to get it just how you want it, however it’s easy to add a bigger piece of cork if you want it more buoyant or trim a bit off if it’s too buoyant. Once you have got it exactly how you want it you’ll be guessing it spot on the next time you do it.
You now have a perfectly balanced hookbait which will sit up begging to be taken in by a Carp when it's fished over your baited area. This can be especially useful in winter when many anglers look to scale-down their approach, and furthermore the cork is a perfect match with the colour of the Poloni Dumbell hookbait.
They do them in two different sizes so you can step up to a bigger Dumbell if needed or go small if you want a delicate presentation, making it look completely unobtrusive. It’s a brilliant way of tripping up the wisest and often biggest carp in the lake. Another tip is to ensure you use low oil hookbaits.
The spicy attraction emitted from the low oil Poloni hook bait is water soluble and will therefore release flavour even in cold water, used in tandem with the cork you will have an attractive balanced hookbait that all carp find difficult to resist.