Here is a montage that I have been using almost exclusively for the past two years, from my friend Philippe Rivet. The Trigger rig is easy to make and it gives a very aggressive angle to the hook that bites every time. The ring ensures that the bait is always positioned at the same distance from the hook. This rig works equally well in pop-up, bottom, or balanced mode. I use it with Gardner Mugga hook #4 or 6. An overall length of 15 cm (6 inches) is quite sufficient with a 35 lb (16 kg) Gardner Ultra Skin braid.
Happy fishing!
Steve