Flymaker, if it helps I usualy fish 3 flys if stillwater nymphing, Tie on about 6ft of 7lb nylon, then using a triple surgeons knot add another 5 feet 0f 6lb leader leaving the tag end long enougth to tie on your first nymph ( I like a spider or a chironomid about size 16). Then add another 5 feet of 5lb leader using the same knot and tie a nymph of a diferent colour to the tag end and finaly on the end of the leader add one more nymph, If you use a small beadhead patern it will help to slowly pull the other nymphs down a bit deeper. My favorit in the lakes of my area is a damsel nymph on the end, a hair and copper or a chironomid on the first (middle) dropper and a spider patern on the top dropper.
Hope this helps.
All the best.
Mike.