I rig the 5" one on a 4/0 Gamakatsu EWG hook. I fish them weightless unless I want the bait to get into the vegitation or fall faster. At that point I might use a small tungsten weight pegged or use a belly weighted hook.
I do not use salt in my baits and the fall is perfect. The tail shimmys on the fall so subtle but enough to draw the most wary fish in to see what is up!
I have use a 5/0 and a 3/0 and the fall rate is still just right as well. I did pour some with salt but the salt kills the subtle action of the tail to much IMO.
The action is much like that of the carrot baits.
Jim