I know everyone likes these tube and worm deals but frankly I have not had as much success with them as the guru's (Soares, Santini, et al) claim. Also, the sand worm never stays on for very long even at 1.5 knots. And it is hard to procure large meaty sand worms.
Yes they work, but so does a potato peeler if you fish it long enough.

The Tube has been around for eons. adding an expensive worm that falls off in the first 5 mins is a waste IMO.
I tried hooking eels, squid, plastic worms...the tube alone works just as well IMO.
I have to say I have a tub of tubes...I have tried them all. And the ones they like have a single small hook in the tail. IMO you miss a lot of fish with that setup. You need a bigger (higher quality) hook (and 2 of them) and a stiffer wire to hold the shape of the tube. No 2 tubes work the same the way the rig them.
The key is as close to the bottom as you dare and as slow as you can go.
I plan to try it this year on my dowrigger that maintains a distance off the bottom. I would rather drag a live scup then these tubes.
scup stay on the hook and are cheap.