I never saw a real zoom trick worm but its my understanding that they are "one sided" meaning the mold is an open pour 1 sided mold, I have LC's 6" trick worm mold and it pours great. It took me some time to get confidence that a 1 sided bait would catch fish but them I figure nothing in nature is perfectly round, straight or ribbed to look like some of the fully rounded baits out there.