When I use a dropper(which is most of the time)I change attatchment to what I am doing.If dry to dry/emerger, I like the tippet thru the front fly(usually a bigger hook size) then tie on next size down tippet with a surgeon's knot to the trailing fly. Dry to nymph dropper I usually tie to the hook bend of the dry fly and once again go with the next size down tippet mtrl. Nymph to nymph depends wether I go doubles or triples. Doubles I do the tie it on and leave a long tage end. Triples I will do the long tag end and then tie to the bend fo the second fly to the third frly since with me the third fly is usually a #16 or less un wieghted nymph.