Do you guys prefer to tie directly onto a crankbait, or do any of you use a  duolock snap swivel like the ones that come on Wiggle Warts? Just wondering.....

There's a difference between a snap-swivel and a plain old snap.  The first actually has a swivel as part of the rig, the second does not.  That said, I ALWAYS use a plain snap on all my CB's.

Thanks that is what i was wanting to know.

I also use a snap, of the duolock variety. Not a snap swivel.

Norman Speed Clip.

I use nothing but split rings except on my spook type baits and I tie the line directly to them with a Rapala knot.