Bristle helicopter rig.
Cut two lengths of 0.5 mm silicone tubing.Slide one onto your mainline.Next slide on a size 12 swivel.Slide on second bit of silicone.Take a 1 inch length of bristle from a broom.Must be stiff not supple.Push the bristle through the swivel eye with the line running through.Now fix in place with the two bits of silicone tubing.Probably best to get the components and you will see how it is set up.
I know some use the power gum or pole elastic especially those on Tring but this is only required if you are fishing tiny hooks and light hooklengths.As I said dont overcomplicate what is a very effective rig and a safe one if set up as I have described.
Two hooks or one ?Michael T 3 is spot on. Matter for the individual but I dropped the second hook as it cost me fish at the netting point.Not lost fish at the net but time getting the second hook out of the landing net mesh I wasn't getting the bait back out during what can be very limited feeding periods in winter.When I did use two I noticed that practically every fish would come on the hook nearest to the feeder.Only on rare occasions and strangley during daylight did the top hook come into play.With the helicopter rig as above I now would slide the hooklength around to find the optimum position.As you should be re casting every twenty minutes or so this is not a problem.
Last mesage I said 1.75 ounce is the best feeder weight, in heavy undertows you may have to go up.I think from memory I have fished as much as three to keep position, just be careful playing the fish.It stil remains balanced bite wise as you will have to add weight to the bobbins too which is why I use bobbins (Solar) and take a few add on weights rather than swingers (modified Bob Hendersons).
For Tench and Bream I go in line by the way as a paternoster is not so good in weed.
Finally I like braid as a mainline but I do use a nylon leader.This acts as a shock absorber when playing fish under the rod tip.You wont get smashed up but hook pulls are eliminated (one in ten years)The mainline braid is 10lb the nylon shock leader is 6lb .I know it sounds crude but it is only one rig for certain situations.