Knot for tamdom rig

[dmtfish]

I have been fishing tandem rigs for years, and i don't mess with the swivels... I tie a jig head on the bottom, and about 18" above that I tie an overhand knot with a small loop. Then I make another overhand knot with the loop to keep it from slipping.... Pass that loop through the eye of the second jig head and around the hook. The knot strength might not be great, but you can tie this rig very quickly and it works for me.