Loop to loop for line to leader. Barrel swivel at the end of the leader, then about 8" of 2x to the first fly, then 18"-24" of 3x to the next fly, and if I am doing a triple set up, then another 18" - 24" to the bottom fly. I've been typically doing two fly set ups as of late. Nothing but clinch knots or improved clinch knots for fly connections.