I have tried the artificial sea worm with the tube & worm & they do work, tho not nearly as well as the real things......
A master tube & wormer once told me that the secret to the rig is that the large tube is just a CONVEYANCE to presenting the worm at the end, the worm is what gets them to strike & that should be as tasty & real as possible.
Real worms emit scents no plastic ever could , even scented plastics.
Maury "Raven"