I have used some smaller plastics a few times with huge success, jigging and casting Berkley Gulp 4" pogys with a 3/4 or 1 oz jig head was killer in the seychelles and on the barrier reef, i found that they were catching fish when guys with other plastics were not, i think its because of the very strong scent they have. They are not very pleasant smelling, and believe me the smell lingered, but the results spoke for themselves!!