used to use fish finder rig....then tried hi lo....like some others..had very positive results....cast further, give choice of bait, hit two difference depths. hardly use fish finders anymore...even though every article will always say fish finder for surf...bad part is hi lo is not easiest rig to make..for me at least....pre tie them at home ...
use 50lb Seaguar flourocarbon for leader..start with 6 feet of leader.at top tie swivel..then 6-8 inch down tie dropper loop, then another dropper loop 6-8 inch down...and then at end a loop to attach sinker. when done it will measure about 3 feet in length...just make sure your dropper loops are big so you can get hook on after your done....I like 5/0 gamakatsu siwash hooks on my rig....
hope that helps...